Merge pull request #761 from rjc123/newmappings

Various configs and changes to configs.
Remove duplicate org-site relationship for directgov_drugdrive

Having GDS as the owning org via whitehall_slug and also in
extra_organisations was making the site show up twice on the GDS
org page in Transition.
Merge pull request #763 from alphagov/remove_extra_org_for_drugdrive

Remove duplicate org-site relationship for directgov_drugdrive
Update RPA main-site timestamp