Cleanup unit tests run [EE-519]
While working on unit tests for CDP, I realized that we could improve the way we run unit tests which will be base for future work in EE-519.
This MR is:
- redesigning pipeline so we could see unit jest tests separate from mocha tests (and run in parallel)
- adding command to run tests only (for better dev experience)
- updating readme to be up to date with current state
Edited by Agnieszka Czyzewska