core (memory/disco): getInfos now handle node + use client instead of profile in many methods

src/plugins/plugin_xep_0055.py

@@ -85,7 +85,8 @@ class XEP_0055(object):
         @param profile (unicode): %(doc_profile)s
         @return: list[jid.JID]
         """
-        d = self.host.findFeaturesSet([NS_SEARCH], profile=profile)
+        client = self.host.getClient(profile)
+        d = self.host.findFeaturesSet(client, [NS_SEARCH])
         return d.addCallback(lambda set_: list(set_))