Added unit tests for embargo. Test coverage now includes testing search and show view for owner, non-logged in user and a user in a group that has access to the work. The tests put a work in embargo and out of embargo."

Added tests to make sure search (Solr query) is correctly enforcing embargo

Added tests to make sure search (Solr query) is correctly enforcing embargo

Tests for making sure groups work correctly with embargo

Conflicts:
	spec/features/end_to_end_spec.rb