Rails 5.0 -- Fix comments_controller_spec.rb and moderations_controller_spec.rb

[yuenmichelle1]

Changes

• permit params and convert to_h because AC Params no longer inherits from HashWithIndifferentAccess https://edgeguides.rubyonrails.org/upgrading_ruby_on_rails.html#actioncontroller-parameters-no-longer-inherits-from-hashwithindifferentaccess.
  • Our fork/talk-version of restpack-serializer expects params to come in as a Hash (otherwise will return filters as {} when we do have filters in our params) See: https://github.com/zooniverse/restpack_serializer/blob/637aaaf85eda4f467c034f19f52e3f0cb6b20112/lib/restpack_serializer/options.rb#L58

This reminds me that as a future TODO: We need to update our fork talk-api branch of restpack-serializer, similar to how we did panoptes. (I.e. update protected_attributes gem with protected_attributes_continued and update version constraints)