Room stored with chat type in DB when we are invited
Because we receive a "message", the invitation.
\<message from='cerybcgercr@chat.jabberfr.org' to='jimjid' type='normal'>
\<subject>Invitation\</subject>
\<body>You have been invited to the cerybcgercr@chat.jabberfr.org room by friendjid
Reason: None given\</body>
\<x xmlns='http://jabber.org/protocol/muc#user'>
\<invite from='elghinn42@jabber.fr'/>
\</x>
\<x jid='cerybcgercr@chat.jabberfr.org' xmlns='jabber:x:conference'>None given\</x>
\</message>