Add cabinet office as extra organisation for ACOBA and IRP
Merge pull request #936 from rjc123/newmappings

Add cabinet office as extra organisation for ACOBA and IRP
Configure Charity Commission Welsh alias
Merge pull request #937 from rjc123/newmappings

Configure Charity Commission Welsh alias
Update timestamp for VOA
Merge pull request #938 from rjc123/newmappings

Update timestamp for VOA
Remove references to redirection_date

- Remove the redirection_date line from the generated file from the
  new_site rake task.
- This is part of reconfiguring transition to be the canonical source of
  redirection (transition) dates, in an attempt to keep them up to date
  without developer intervention.
Remove the redirection_date line from all existing site YAML

I paired with @rjc123 on this to do it in a script rather than me
spending quite a while removing them manually:

`while read line; do grep -v redirection_date $line >
site_list_redirection_date.txt; mv site_list_redirection_date.txt $line;
done < site_list.txt`