Added HealthCheck controllers to each project

This is the first step in removing the Guardian Management library.

 After this is rolled out we will remove the old healthchecks.
Did not like that import
Merge branch 'master' of github.com:guardian/frontend into die-management-die
Cleaned up the code a bit.

Too many methods can be a bad thing...
Merge branch 'master' of github.com:guardian/frontend into die-management-die
Merge pull request #5168 from guardian/die-management-die

Added HealthCheck controllers to each project