New Phabricator on qadevel-stg

[Kamil Paral]

> I've built new rpms for phabricator and deployed them to staging.
> 
> https://phab.qadevel-stg.cloud.fedoraproject.org/
> 
> If you have a bit of time, please help poke at the staging instance so
> we have some confidence that deploying the new versions to production
> won't break things horribly :)

I tried common ticket/diff operations and I haven't seen any problems.