This restores useRoomAsSharedDocumentName and openSharedDocumentOnJoin
config settings in our jitsi meet config.js. We had lost these settings
in the recent jitsi meet web container update. To restore them we
provide an alternative settings-config.js template to the container so
that when it generates its configs we get these vars included.
We stop managing the config.js file in /var/jitsi-meet/web to avoid
confusion with ansible replacing configs that may be used then.
Change-Id: I4d2bd77e03812695792cda2abb7f401288186f2c
c1bb5b52cf