Add mock finder #621

Job	Run time
Test Collections / Run RSpec	2m 40s
Test Collections Publisher / Run RSpec	1m 54s
Test Contacts Admin / Run RSpec	1m 41s
Test Content Data API / Run RSpec	2m 53s
Test Content Publisher / Run RSpec	3m 17s
Test Content Store / Run RSpec	24s
Test Email Alert Frontend / Run RSpec	52s
Test Email Alert Service / Run RSpec	29s
Test Content Tagger / Run RSpec	2m 22s
Test Feedback / Run RSpec	1m 6s
Test Finder Frontend / Run RSpec	51s
Test Frontend / Run RSpec	3m 36s
Test Government Frontend / Run Minitest	5m 55s
Test HMRC Manuals API / Run RSpec	50s
	28m 50s

Provide feedback