- Improved subscriber error handling and logging

- Added wait conditions to ensure Context connects to NATS.

- Corrected URL format

- Skip NATS client port from linkerd
- Add NATS backend logging messages

- Added/Updated headers
- Added script to update copyright headers

- added support for username and password
- added support for direct URI

- updated old gitlab.com URLs by new labs.etsi.org URLs.
- updated Context to use secrets generated by CockroachDB and NATS

- disabled event testing; operation works, but sometimes tests get stuck
- added dynamic wait for CockroachDB and NATS containers to start
- tuned grace shutdown period
- improved NatsBackend termination

- Added backend for NATS message broker
- removed unneeded test script

- disabled Redis MessageBroker backend

Common:
- Implemented Message Brokering framework supporting multiple backends
- Implemented InMemory Message Brokering Backend for testing purposes
- Implemented Redis Backend
- Implemented Message Brokering unit tests
- Minor improvements in ORM Framework
- Added Message Broker framework unit testing into automated local tests

Common:
- Added missing test units for ORM framework
- Solved few bugs in ORM framework
- Implemented initial skeleton of MessageBroker to implement GetEvents methods for Context.

Context:
- Implemented TopologyModel and related test units
- Solved few bugs in ContextModel