Merge pull request #472 from rjc123/master

Move dwp research and statistics to bouncer
Remove accidentally retained dwp_research.yml
Migrate AGO to Bouncer
Migrate BIS Lowpay to Bouncer
Migrate BIS OME to Bouncer
Migrate BIS UKAEA to Bouncer
Migrate DPM to Bouncer
Migrate Number 10 to Bouncer
Migrate OAG to Bouncer
Migrate Scotland Office to Bouncer
Migrate Treasury to Bouncer
Merge pull request #474 from alphagov/move_fourth_batch_to_bouncer

Move fourth batch to bouncer
Remove a redundant mappings file

This site is managed by Transition now, so these mappings are ignored, but they
shouldn't be here anyway.
Query params should be lowercase
Site query strings must be lowercase
Migrate DCMS to Bouncer
Migrate MOD to Bouncer
Move Cabinet Office to Bouncer
Move DECC to Bouncer
Move DFID to Bouncer