Misc fixes after performance testing

+#
+# Copyright © 2016-2017 The Thingsboard Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 FROM cassandra:3.9
 
 COPY ready-probe.sh /

+#
+# Copyright © 2016-2017 The Thingsboard Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 apiVersion: v1
 kind: Service
 metadata:
@@ -49,13 +65,6 @@ spec:
           name: cql
         - containerPort: 9160
           name: thrift
-        resources:
-          limits:
-            cpu: "500m"
-            memory: 1Gi
-          requests:
-           cpu: "500m"
-           memory: 1Gi
         securityContext:
           capabilities:
             add:
@@ -104,7 +113,7 @@ spec:
   - metadata:
       name: cassandra-data
       annotations:
-        volume.beta.kubernetes.io/storage-class: slow
+        volume.beta.kubernetes.io/storage-class: fast
     spec:
       accessModes: [ "ReadWriteOnce" ]
       resources:
@@ -113,7 +122,7 @@ spec:
   - metadata:
       name: cassandra-commitlog
       annotations:
-        volume.beta.kubernetes.io/storage-class: slow
+        volume.beta.kubernetes.io/storage-class: fast
     spec:
       accessModes: [ "ReadWriteOnce" ]
       resources:

 #!/bin/bash
-
-# Copyright 2016 The Kubernetes Authors.
+#
+# Copyright © 2016-2017 The Thingsboard Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -13,6 +13,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
 
 if [[ $(nodetool status | grep $POD_IP) == *"UN"* ]]; then
   if [[ $DEBUG ]]; then

+#
+# Copyright © 2016-2017 The Thingsboard Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ---
 apiVersion: storage.k8s.io/v1beta1
 kind: StorageClass
@@ -6,4 +22,12 @@ metadata:
 provisioner: kubernetes.io/gce-pd
 parameters:
   type: pd-standard
+---
+apiVersion: storage.k8s.io/v1beta1
+kind: StorageClass
+metadata:
+  name: fast
+provisioner: kubernetes.io/gce-pd
+parameters:
+  type: pd-ssd
 ---
\ No newline at end of file

+#
+# Copyright © 2016-2017 The Thingsboard Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 apiVersion: v1
 kind: Pod
 metadata:

+#
+# Copyright © 2016-2017 The Thingsboard Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ---
 apiVersion: v1
 kind: Service
@@ -71,13 +87,6 @@ spec:
           name: coap
         - containerPort: 9001
           name: rpc
-        resources:
-          limits:
-            cpu: "250m"
-            memory: "500Mi"
-          requests:
-           cpu: "250m"
-           memory: "500Mi"
         env:
         - name: ZOOKEEPER_ENABLED
           valueFrom:

+#
+# Copyright © 2016-2017 The Thingsboard Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 FROM ubuntu:16.04 
 ENV ZK_USER=zookeeper \
 ZK_DATA_DIR=/var/lib/zookeeper/data \

 #!/usr/bin/env bash
-# Copyright 2016 The Kubernetes Authors.
+#
+# Copyright © 2016-2017 The Thingsboard Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,6 +13,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
 
 ZK_USER=${ZK_USER:-"zookeeper"}
 ZK_LOG_LEVEL=${ZK_LOG_LEVEL:-"INFO"}

 #!/usr/bin/env bash
-# Copyright 2016 The Kubernetes Authors.
+#
+# Copyright © 2016-2017 The Thingsboard Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -12,6 +13,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
 
 # zkOk.sh uses the ruok ZooKeeper four letter work to determine if the instance
 # is health. The $? variable will be set to 0 if server responds that it is 

+#
+# Copyright © 2016-2017 The Thingsboard Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 apiVersion: v1
 kind: Service
 metadata:
@@ -70,10 +86,6 @@ spec:
       - name: zk
         imagePullPolicy: Always
         image: thingsboard/zk:k8stest
-        resources:
-          requests:
-            memory: "500Mi"
-            cpu: "250m"
         ports:
         - containerPort: 2181
           name: client