#000 - Fix tests: Move assigns() checks to new Rails 4 way.

Variables assigned inside an erb are no longer verifiable using assigns(). They show
up as usual variables on the object itself.
#000 - Fix tests: Fix template index specs.

find in new Capybara does not work exactly as the old one.
#000 - Fix tests: Remove double render path.

The earlier test was wrong. Had provided a wrong fingerprint. So, the test
was going down a different path.
#000 - Fix tests: Remove ?N/A from some URLs in specs.
#000 - Fix tests: Small change in output format.
#000 - Fix tests: Fix expectation for Rails 4 performed? check.

The performed? checks in Rails 2 and Rails 4 differ. Fix expectation
of call to committed? on response object.
#000 - Fix tests: Unauthorized access of admin functionality.

Had to get the config_error template from older Rails.
#000 - Make config error pages consistent.

Bringing across config_error pages from older Rails.