Fix for RPC calls in Kafka actions

@@ -16,16 +16,16 @@
 package org.thingsboard.server.common.msg.core;
 
 import lombok.Data;
-import org.thingsboard.server.common.msg.session.FromDeviceMsg;
+import org.thingsboard.server.common.msg.session.FromDeviceRequestMsg;
 import org.thingsboard.server.common.msg.session.MsgType;
 
 /**
  * @author Andrew Shvayka
  */
 @Data
-public class ToServerRpcRequestMsg implements FromDeviceMsg {
+public class ToServerRpcRequestMsg implements FromDeviceRequestMsg {
 
-    private final int requestId;
+    private final Integer requestId;
     private final String method;
     private final String params;