Cellar local listeners have to check if sync is enabled

Now, the Cellar local resources listeners (like the LocalBundleListener, LocalFeaturesListener, etc) ignore if sync flag is true or false and always update the distributed map and broadcast the cluster events.

It can be perturbing for the users: the users expect that Cellar doesn't do anything if sync is disabled for a given cluster group.

So, as it's done in the synchronizers, the local listeners should check the status of the sync flag and, if false, they shouldn't do anything.