- KFK_NAMESPACE and KFK_PORT

- KFK_SERVER_PORT and KFK_REDOPLY added into my_deploy.sh file.
- refines kafka env variables import

- KFK_SERVER_ADDRESS_TEMPLATE now defined inside the class KafkaConfig.
- variable renamed to "SERVER_ADDRESS" from "server_address"

- get the values of KAFKA_NAMESPACE and KFK_SERVER_PORT to create KAFKA server address.

- Added missing YANG data models
- Updated build-yang-bindings.sh script
- Corrected unitary test test_ietf_network.py
- Reorganized message composer scripts
- Removed unneeded code files
- Implemented composition of nodes, links, termination points, and networks
- Implemented manual fixes for what pyangbind does not support
- Added NameMapping class to cache entity names

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

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

- monitoring/test_monitoring.py: provides a basic testing skeleton
- monitoring/requirements.in/.txt: updated with pytest
- monitoring/genproto.py: added instructions to import generated Python modules using "from . import ..." instead of "import ..."; otherwise, pytest and other possible modules doing imports might complain.
- monitoring/monitoring_server.py: packed start_server and stop_server functionaity to simplify test definition, minor formattings, bug resolutions and improvements in package import.
- monitoring/monitoring_client.py: minor formattings, bug resolutions, and improvements in package import.