Made RestApiCallNode extendable (for custom rule-nodes)

@@ -58,7 +58,7 @@ import java.util.concurrent.TimeUnit;
 
 @Data
 @Slf4j
-class TbHttpClient {
+public class TbHttpClient {
 
     private static final String STATUS = "status";
     private static final String STATUS_CODE = "statusCode";
@@ -162,7 +162,7 @@ class TbHttpClient {
         }
     }
 
-    void processMessage(TbContext ctx, TbMsg msg) {
+    public void processMessage(TbContext ctx, TbMsg msg) {
         String endpointUrl = TbNodeUtils.processPattern(config.getRestEndpointUrlPattern(), msg.getMetaData());
         HttpHeaders headers = prepareHeaders(msg.getMetaData());
         HttpMethod method = HttpMethod.valueOf(config.getRequestMethod());

@@ -46,7 +46,7 @@ import org.thingsboard.server.common.msg.TbMsg;
 public class TbRestApiCallNode implements TbNode {
 
     private boolean useRedisQueueForMsgPersistence;
-    private TbHttpClient httpClient;
+    protected TbHttpClient httpClient;
 
     @Override
     public void init(TbContext ctx, TbNodeConfiguration configuration) throws TbNodeException {

@@ -15,12 +15,14 @@
  */
 package org.thingsboard.rule.engine.rest;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import lombok.Data;
 import org.thingsboard.rule.engine.api.NodeConfiguration;
 
 import java.util.Collections;
 import java.util.Map;
 
+@JsonIgnoreProperties(ignoreUnknown = true)
 @Data
 public class TbRestApiCallNodeConfiguration implements NodeConfiguration<TbRestApiCallNodeConfiguration> {