RecurringSubscription. Add environment configuration files to unit tests setup. Changed the
devRegistry debug port to the same port as registry.
Amend: Updates from peer review.
Change-Id: I4f5a25d4667dc949804b86541a9d9428728b779a
Former-commit-id: 343a2495e5 [formerly 33a3dead503276926af71d7355f87242f5250e54]
Former-commit-id: 4537513df7