PersistentWatcher no longer be used with namespaced CuratorFramework instance

[hanson76]

We are trying to upgrade to 5.8.0 and found out that we can not use a namespaced instance of CuratorFramework together with CuratorCache. CuratorCacheImpl uses PersistentWatcher internally that calls client.getCuratorListenable() which is hardcoded to throw an exception in NamespaceFacade.

Is this intentional or a regression?

[kezhuw]

It caused by #520(CURATOR-729 shipped in 5.8.0) which is a fix to #464(CURATOR-673 shipped in 5.6.0).