Removed STABLE from default stack-new

Author: belaban

src/org/jgroups/util/Util.java

@@ -263,7 +263,6 @@ public static Protocol[] getTestStackNew(Protocol... additional_protocols) {
           new SHARED_LOOPBACK_PING(),
           new NAKACK4(),
           new UNICAST4(),
-          new STABLE(),
           new GMS().setJoinTimeout(500),
           new FRAG2().setFragSize(8000)
         };