Under Rails 5.0, the ActionController::Parameters class no longer inherits from Hash and is now its own class that delegates some methods to an internal Hash.

This causes failures in tests for the Foreman::Controller::Parameters::* concerns which have equality assertions on AC::Parameters and hashes, to check the expected filtered output, e.g.

--- expected
+++ actual
@@ -1 +1 @@
-{"plugin_ext"=>"b"}
+<ActionController::Parameters {"plugin_ext"=>"b"} permitted: true>

AC::Parameters has a #to_h method that returns a hash (in both 4.2 and 5.0), so these tests can trivially be updated to call #to_h before comparing the filtered object to a hash.