Updating Larry the cat's biography on number 10 history page

Make the text future-proof so we don't have to update it each time he has an anniversary.
make larry official again
Remove legacy delayed job code and table

Now that the sidekiq-powered jobs have been deployed and the remaining
delayed jobs have been worked off, the delayed job code can be
removed and the table dropped.
Merge pull request #1403 from alphagov/update_larry_cat_bio

Updating Larry the cat's biography on number 10 history page
Only skip railties when compiling asssets

So it turns out active_record itself was always being loaded, because
delayed_job_activerecord was requiring it. Now that that's gone, we
need to explicitly require it here, otherwise the isbn_validation gem
falls over. This also gets rid of the reference to
DISABLE_ACTIVE_RECORD, as that doesn't appear to be in use anymore.
Merge pull request #1405 from alphagov/cleanup-delayed-job

Remove legacy delayed job code and table
Move frontend to policy groups
Update tests for frontend
Use policy_group over policy_advisory_groups
More switching of advisory_group -> group
Remove frontend references to policy teams

They are now all groups. Teams should go, admin to follow.
Rename advisory group -> group in admin

On the frontend just display group, but use the policy_group model.
Update translations to just have group

Removed team and used the translation for `advisory_group` for `group`
some of these will want updating but it means they will at least have
something till they are updated.
Remove Policy Teams from admin

- Remove controller and views
- Remove calls to teams from policy pages
- tidy up a few calls to team on the frontend which were missed
Update test for new css selector
Fix failing cucumber

Was a little to hasty and removed the term group
Update search index for new policy-groups

Remove the old data from the index and then add the new data. The old
urls have to be hard-coded because the rails routes for the old urls has
already been deleted.
On the front end: Policy group -> group
Use groups path in the admin