Removing debugging change from unit test.

Motivation:

HttpToHttp2ConnectionHandlerTest was accidentally modified with a
debugging value for WAIT_TIME_SECONDS.

Modifications:

Reverted the change.

Result:

original wait time restored.

codec-http2/src/test/java/io/netty/handler/codec/http2/HttpToHttp2ConnectionHandlerTest.java

@@ -70,7 +70,7 @@ import org.mockito.stubbing.Answer;
  * Testing the {@link HttpToHttp2ConnectionHandler} for {@link FullHttpRequest} objects into HTTP/2 frames
  */
 public class HttpToHttp2ConnectionHandlerTest {
-    private static final int WAIT_TIME_SECONDS = 500;
+    private static final int WAIT_TIME_SECONDS = 5;
 
     @Mock
     private Http2FrameListener clientListener;