fixed tests

rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/rest/TbHttpClient.java

@@ -27,7 +27,6 @@ import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.http.client.reactive.ReactorClientHttpConnector;
-import org.springframework.web.client.RestClientResponseException;
 import org.springframework.web.reactive.function.BodyInserters;
 import org.springframework.web.reactive.function.client.WebClient;
 import org.springframework.web.reactive.function.client.WebClient.RequestBodySpec;
@@ -44,13 +43,11 @@ import org.thingsboard.server.common.data.StringUtils;
 import org.thingsboard.server.common.msg.TbMsg;
 import org.thingsboard.server.common.msg.TbMsgMetaData;
 import reactor.netty.http.client.HttpClient;
-import reactor.netty.resources.ConnectionProvider;
 import reactor.netty.transport.ProxyProvider;
 
 import javax.net.ssl.SSLException;
 import java.net.URI;
 import java.nio.charset.StandardCharsets;
-import java.time.Duration;
 import java.util.Base64;
 import java.util.List;
 import java.util.Map;
@@ -60,8 +57,6 @@ import java.util.concurrent.TimeUnit;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 
-import static io.netty.channel.ChannelOption.SO_KEEPALIVE;
-
 @Data
 @Slf4j
 public class TbHttpClient {

rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/rest/TbRestApiCallNodeTest.java

@@ -165,7 +165,7 @@ public class TbRestApiCallNodeTest {
                 try {
                     assertEquals(path, request.getRequestLine().getUri(), "Request path matches");
                     assertTrue(request.containsHeader("Content-Type"), "Content-Type included");
-                    assertEquals("text/plain;charset=UTF-8",
+                    assertEquals("application/json",
                             request.getFirstHeader("Content-Type").getValue(), "Content-Type value");
                     assertTrue(request.containsHeader("Content-Length"), "Content-Length included");
                     assertEquals("2",