Hyrax 5.0.0.rc2 depends on riiif

[marrus-sh]

Descriptive summary

Hyrax 5.0.0.rc2 defines RiiifFile < Riiif::File in app/models/concerns/hyrax/riiif_file.rb, which naturally breaks in production if riiif is not installed.

My guess is that any Hyrax application which uses the Hyrax install generator with the skip-riiif option will break on Hyrax 5.0.0.rc2.

Steps to reproduce the behavior

1. Create a Hyrax application with the skip-riiif option (do not install riiif)
2. Try to run the application (without autoloading enabled)
3. The application will fail, because app/models/concerns/hyrax/riiif_file.rb tries to subclass Riiif::File, which is not defined.

Workaround

Just define :⁠—

module Riiif
  class File
  end
end

—⁠: in the non‐Riiif‐supporting application.

Acceptance Criteria/Expected Behavior

• Hyrax does not require riiif be installed to run.