PropertiesDatastream: Digital object is nil

[escowles]

I think properties_datastream_spec.rb just needs to be updated to create a stub DigitalObject, since AF::File requires it now, there is a commented-out line to do this in one place: https://github.com/projecthydra/sufia/blob/fedora-4/master/spec/models/properties_datastream_spec.rb#L5

Sample test failure:

 57) PropertiesDatastream to_solr solrizes import_url
Failure/Error: PropertiesDatastream.new(nil, 'properties').tap do |ds|
ArgumentError:
Digital object is nil
# /home/travis/.rvm/gems/ruby-2.1.3/bundler/gems/active_fedora-c37f219943b0/lib/active_fedora/file.rb:23:in `initialize'
# ./spec/models/properties_datastream_spec.rb:29:in `new'
# ./spec/models/properties_datastream_spec.rb:29:in `block (3 levels) in <top (required)>'
# ./spec/models/properties_datastream_spec.rb:34:in `block (3 levels) in <top (required)>'
# ./spec/models/properties_datastream_spec.rb:36:in `block (3 levels) in <top (required)>'

[jcoyne]

Fixed by samvera-deprecated/sufia@8fa3691