Change the warning text on statistics announcements

Editors are posting the wrong documents as statistics announcements. This change is to the warning text on the Statistics Announcements page.
Merge pull request #1600 from alphagov/statistics-announcements-warning-text

Change the warning text on statistics announcements
Reduce sidekiq workers per box

This brings whitehall into line with the number of workers on other
apps. It also will help prevent us DDOS-ing transitioning servers during
importing of large numbers of documents/attachments
Merge pull request #1602 from alphagov/reduce-sidekiq-workers

Reduce sidekiq workers per box
Remove the remaining alternate top tasks

The last department are being migrated onto the new style services and
information links. This feature is no longer needed so remove it and all
the related styles to go along with it.
Merge pull request #1603 from alphagov/remove-alt-top-tasks

Remove the remaining alternate top tasks
Configure Whitehall search client

* Adds unified_search_client
* Adds unified_search to NotQuiteAsFakeSearch
* Adds fixture file for the response returned from the  Rummager API being developed
Adds ServicesAndInformation resource

* Adds link to org show page
* Adds route, controller and views
Adds ServicesAndInformationCollection

* Adds ServicesAndInformationFinder to wrap Rummager call
* Adds ServicesAndInformationParser to extract required info from
  Rummager response
Changes to adjust to implemented Rummager API
Adjust parser and fixture to reflect API changes

* Rummager API response now has a different key for content group
Filter organisations needs slug, not name
Look up responses by string rather than symbol
Updates gds-api-adapters to version 12.1.0

* Update necessary to use Rummager test helpers
Update tests to use Rummager test helpers

* Changes tests to use Rummager test helpers in gds_api_adapters gem
Style services and information page
Restores not_quite_as_fake_search to original
Actions PR comments

* Removes ServicesAndInformation#to_partial_path since it is not needed
* Corrects services and information route to comply with standard naming
* Moves 'full list of topics' link inside org Services and guidance
  conditional
* Corrects test to ensure it is using an org with featured services and
  guidance
Adds publication path for services and info
Removes link to full list of topics

* Removing the link will allow us to deploy the services and information
  page without there being an way in the UI to access it.

* Changes features to reflect removing the link

* Actions PR comment for feature scenario clarification