backends quick fix for case where owner not org member

this will need to be fixed correctly so that the lookup only needs to
be done once and possibly switch to use something more comprehensive
than members which seems like it will break given how they are
planning to implement external users ... need a "members + external"
or something otherwise this will be a mess

sparcur/backends.py

@@ -719,6 +719,10 @@ def name_or_email(self):
         oid = self.owner_id
         if oid in self._member_cache:
             return self._member_cache[oid]
+        else:
+            msg = f'owner no longer a member of organization? {self.owner_id}'
+            log.warning(msg)
+            return User(self.bfobject.owner())
 
     @property
     def parent(self):