✅ Specs for SchemaLoader need to be done

[ShanaLMoore]

Summary

The SimpleSchemaLoader and M3SchemaLoader were refactored to inherit from the SchemaLoader. Add specs for the Hyrax::SchemaLoader class and its children if applicable.

Parent Ticket

• ☄️ 🎁 Create and expand Dynamic Schema functionality #5

Base work off of the WIP PR

Acceptance Criteria

• Hyrax::\SchemaLoader has spec coverage

Screenshots or Video

Testing Instructions

Notes

[kirkkwang]

Handled in this commit samvera/hyrax@44b75f9