To be able to run tests based on following criteria:
- Only API is required and tested.
- API and share back-end required, API is tested.
- API and share back-end required, back-end is tested
Also, add doc with detailed description of running subset of tests.
Change-Id: I9ae105eaa527621c85d5038bba15edf4b065eaa3
Closes-Bug: #1587874