if activemq is disabled in settings don't even try to connect
if activemq is disabled in settings don't even try to connect

stomp.py runs neverending loop and some threads otherwise
which sometime leads ella not to initialize


git-svn-id: 6ce22b13eace8fe533dbb322c2bb0986ea4cd3e6@670 2d143e24-0a30-0410-89d7-a2e95868dc81

WhiskeyMedia/ella,petrlosa/ella,whalerock/ella,ella/ella,MichalMaM/ella,WhiskeyMedia/ella,petrlosa/ella,MichalMaM/ella,whalerock/ella,whalerock/ella