Merge pull request #721 from rjc123/admin

Amend tool to accommodate known but ignored domains
Add mapping to current content

https://govuk.zendesk.com/tickets/750059
Merge pull request #722 from rjc123/patch-1

Add mapping to current content
Standardise use of commas in businesslink mappings file
Decommission / redirect all businesslink assets
Decommission old cruft www / lrc assets
Remove spurious duplicate
Merge pull request #723 from rjc123/businesslink

Decommission businesslink assets from redirector, replace with mappings
Change date for HPA
Change date of Phase 1 sites to 1st July
Configure legacy domain with global (nuclear) option to organisational homepage
Add comment regarding legacy domain configuration
Merge pull request #724 from rjc123/newmappings

Change date for HPA
Change date of smokecontrol.defra.gov.uk transition
Configure prtr.defra.gov.uk on transition
Merge pull request #725 from rjc123/newmappings

Configure Defra orgs / sites on transition
Config query strings for prtr
Merge pull request #726 from rjc123/newmappings

Config query strings for prtr
Configure upcoming blogs as global with path preserved
Delete tests for aka.bis.gov.uk

bis has been managed by transition for some time, and now that it
has fully transitioned we shouldn't need to test the aka domain anyway.