Doesn't filter iq results that needs to be delivered to local muc users.

Doesn't filter iq results that needs to be delivered to local muc users. This one reverts a fix for https://igniterealtime.org/issues/browse/OF-772 (https://github.com/igniterealtime/Openfire/commit/b94b52e5e7ee32359fbe5a4747a9c67610203849). But iq queries and results between muc users are correct and there is no need to filter them.