Add lcUri to delete room warning for easier grep

Add lcUri to delete room warning for easier grep/find

Spawned from https://gitter.zendesk.com/agent/tickets/8421 where we want to find who deleted the room

$ ssh deployer@webapp-01
$ sudo su
$ cd /opt/gitter-infrastructure/ansible/

# Generally search for all room deletions
$ ansible webapp-* -i prod -m shell -a 'cat /var/log/upstart/gitter-api-1.log.1 | grep -i "User deleting room"' --become
$ ansible webapp-* -i prod -m shell -a 'cat /var/log/upstart/gitter-api-2.log.1 | grep -i "User deleting room"' --become

# With this MR and lcUri in the logs, we can search for the specific room deletion.
# Previously we would have to somehow find the room ID when the room is gone