Puppetize tails-bar xmpp
Originally created by @Dr_Whax on #13517 (Redmine)
We have our internal XMPP server that is now starting to be used by people, it would help sysadmins and the services team enormously if the setup gets Puppetized, since some bits are already in Puppet.
Finish Puppet code for tails-bar to roll-out a working Prosody server.