roomservice: Change default remote to Octo-Kat

This will change the default remote for roomservice from 'gh' to 'ok' and create the entries found in roomservice.xml with the remote of 'ok' instead of 'gh'.

We want all of the entries for our repos to use 'ok' remote over the 'gh' for future when users need to submit changes for review via gerrit.  

I didn't want to just merge this one without it being reviewed first.