Renamed due to failing name convention checks

Author: markharwood

client/rest-high-level/src/test/java/org/elasticsearch/client/core/tasks/GetTaskResponseTest.java renamed to client/rest-high-level/src/test/java/org/elasticsearch/client/core/tasks/GetTaskResponseTests.java

@@ -36,7 +36,7 @@
 
 import static org.elasticsearch.test.AbstractXContentTestCase.xContentTester;
 
-public class GetTaskResponseTest extends ESTestCase {
+public class GetTaskResponseTests extends ESTestCase {
 
     public void testFromXContent() throws IOException {
         xContentTester(