Fix broken for management on orgs show page

• add clear-person class to every 4th person

https://www.pivotaltracker.com/story/show/68428180
add missing comma
Remove unneccessary DJ call

This code uses sidekiq and not delayed job
Move search indexing from delayed job to sidekiq

As well as creating a new sidekiq-compatible workers to perform search
indexing and deleting of whitehall models, this also introduces a new
interface that hides the background-jobiness of the actions, i.e.
the Whitehall::SearchIndex.add and delete methods. This reduces the
number of integration points for search index actions and hides the
search index mechanisms away from the client code.

Note that the existing delayed job worker code is left in place. This
is so that any existing jobs that may be queued can still be run. The
code can be removed once the backlog of jobs has been worked off.
Update ForcePublicationAttempt to use sidekiq

Once again, the existing job is left in place for deletion later once
the backlog of delayed jobs have completed.
Cleanup delayed_job testing helpers

These are no longer required in the tests as all jobs now use sidekiq.
Sidekiq jobs are worked off inline during the test unit tests.

This also bumps the sidekiq gem so that we can take advantage of its
new test helpers to control whether jobs are performed inline or not
for specific tests and cucumber scenarios.
Merge pull request #1400 from alphagov/fix-analytics

Add missing opt_value to ga event tracking
Merge pull request #1386 from alphagov/add-clear-person-to-management-orgs-showpage

Fix broken for management on orgs show page
Handle missing records when indexing for search

There is nothing to index if the instance does not exist, therefore
the job should silently succeed.
Merge pull request #1399 from alphagov/migrate-away-from-delayed-job

Convert remaining delayed jobs to use sidekiq
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