Change the timeout for spark startup and waitForStopped, also wiremock will use dynamic ports

Author: vikasrathee-cs

src/test/java/io/cdap/plugin/http/etl/HttpStreamingSourceETLTest.java

@@ -50,7 +50,7 @@ public class HttpStreamingSourceETLTest extends HttpSourceETLTest {
   private static final Logger LOG = LoggerFactory.getLogger(HttpStreamingSourceETLTest.class);
   private static final ArtifactId APP_ARTIFACT_ID = NamespaceId.DEFAULT.artifact("data-streams", "1.0.0");
   private static final ArtifactSummary APP_ARTIFACT = new ArtifactSummary("data-streams", "1.0.0");
-  private static final int WAIT_FOR_RECORDS_TIMEOUT_SECONDS = 180;
+  private static final int WAIT_FOR_RECORDS_TIMEOUT_SECONDS = 300;
   private static final long WAIT_FOR_RECORDS_POLLING_INTERVAL_MS = 200;
 
   @BeforeClass