Smack requests getAdmins() in wrong MUC namespace

Hi.

I just discovered, that Smack sends the MUC getAdmins() request in the wrong namespace.

Smack sends in #owner namespace:

<iq id="9S7Hf-35" to="5711dc10-967e-487d-bcce-308ab796b958@conference.domain" type="get"><query xmlns="http://jabber.org/protocol/muc#owner"><item affiliation="admin"/></query></iq>

The specification says, it must be in #admin namespace:

http://xmpp.org/extensions/xep-0045.html#modifyadmin

<iqfrom='bard@shakespeare.lit/desktop'
    id='admin3'
    to='coven@chat.shakespeare.lit'
    type='get'>
  <queryxmlns='http://jabber.org/protocol/muc#admin'>
    <itemaffiliation='admin'/>
  </query>
</iq>

The whole method getAffiliatesByOwner() doesn't make much sense (it is not specified by XMPP) and is only called by getAdmins().