Merge branch 'feature/rub_data_model_improvements' into 'develop'

.env.template

.env.template.development

hyrax/app/forms/hyrax/dataset_form.rb

hyrax/app/models/dataset.rb

hyrax/app/models/solr_document.rb

hyrax/app/presenters/hyrax/dataset_presenter.rb

hyrax/app/views/hyrax/datasets/_attribute_rows.html.erb

hyrax/config/locales/dataset.en.yml

hyrax/config/locales/en.yml

hyrax/lib/vocabularies/rdms.rb