core (disco), plugin XEP-0115: client use + capabilities hash improvment:

- modified a couple of method from memory to use client instead of profile
- XEP-0115: don't use unique hash for all clients anymore, as disco can be different between clients/components, and even between clients (different identity for instance).
    hash is now generated per client on each new session.

src/plugins/plugin_xep_0329.py

@@ -204,6 +204,7 @@ class XEP_0329(object):
         host.bridge.addMethod("FISList", ".plugin", in_sign='ssa{ss}s', out_sign='aa{ss}', method=self._listFiles, async=True)
         host.bridge.addMethod("FISSharePath", ".plugin", in_sign='ssss', out_sign='s', method=self._sharePath)
         host.trigger.add("XEP-0234_fileSendingRequest", self._fileSendingRequestTrigger)
+        host.registerNamespace('fis', NS_FIS)
 
     def getHandler(self, client):
         return XEP_0329_handler(self)