FileSetActor.create_content blows up with a local file

[hectorcorrea]

Methods FileSetActor.create_content and FileSetActor.copy_file_to_working_directory work only when the file passed is an UploadedFile, but throw errors when the file passed is a plain Ruby File object. See https://github.com/projecthydra-labs/curation_concerns/blob/master/curation_concerns-models/app/actors/curation_concerns/file_set_actor.rb#L50-L59

Both of these methods expects properties not found in a regular File object, in particular original_filename, and content_type.

This is not detected in the current test suite because (1) we are only testing with a Rack::Test::UploadedFile and (2) the double used in ingest_local_file_job_spec.rb is masking the problem.

[jcoyne]

@hectorcorrea Colin is already taking care of this in #460