code: private void changeAffiliationByAdmin(Jid jid, MUCAffiliation affiliation)
                      throws NoResponseException, XMPPErrorException,
                      NotConnectedException, InterruptedException {
          changeAffiliationByAdmin(jid, affiliation, null);
      }
docs: Tries to change the affiliation with an 'muc#admin' namespace
  
  @param jid
  @param affiliation
  @throws XMPPErrorException
  @throws NoResponseException
  @throws NotConnectedException
  @throws InterruptedException