events: fix wrongly returned author data.

rhodecode/events/base.py

@@ -56,12 +56,14 b' class RhodecodeEvent(object):'
     @property
     def actor(self):
         auth_user = self.auth_user
+
         if auth_user:
             instance = auth_user.get_instance()
             if not instance:
                 return AttributeDict(dict(
                     username=auth_user.username
                 ))
+            return instance
 
         return SYSTEM_USER