jicofo: add optional XMPP_PORT value (#1275)
* jicofo: add optional XMPP_PORT value * include compose and env example for XMPP_PORT * extends use of the XMPP_PORT property * fix compose to use default * re-commenting XMPP_PORT value * include XMPP_PORT in compose for all services * always use $XMPP_PORT, value defaulted in template * missing JVB setting
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da0a43a3