fixes #4151 - enable reports STI

Permits subclassing of ReportImporter and Report to import and store
new types of reports associated to hosts.

Fixes #12311 - Fix issue with failed initialization of rack openid middleware.

This fix is for rails4 but is backwards compatible with rails3

When placed in a rails initializer the rack middleware fails to
load, throwing a can't modify frozen array error. Moving the...

Refs #11813 - Use new engines listing syntax in initializers

refs #12147 - correcting route for unattended controller

Fixes #11016: added test-unit gem for ruby 2.2.x

Fixes #10988 - Remove 1.11 deprecations

Fixes #7567 - Substitute find_or_create_by by first_or_create

Rails 3 and 4 both support the syntax 'where(args).first_or_create'.
find_or_create_by is no longer valid on Rails 4 so we should remove it
here already

Fixes #11692: update ace-rails-ap to 4.x.

http://projects.theforeman.org/issues/11692

Fixes #11812 - Remove whiny nils and add eager load

In Rails 4 eager_load is mandatory, and whiny_nils are already useless
in Foreman as we don't support 1.8.7.

Fixes #11818 - Update match routes to get

Some of our routes use match when they really mean just 'get'. Rails 4
forces us to choose a verb, and we can do this already on Rails 3.