Implement new osm_client.proto
	Create logic to manage request provide by NBI microservice
		Including ServiceServicer implementation

ToDo: Automatic test with HTTP Mock
	Dockerfile

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

- added MockOSM package

- monitoring/requirements.txt: removed garbage on top of file
- monitoring/monitoring_client.py: solved bug in return values of some methods and wrong code in test case
- monitoring/monitoring_server.py: solved bug with instantiation of servicer class
- monitoring/Dockerfile: clarified some arguments in package installation, moved code in container to /var/monitoring, added upgrade of essential python packages, other minor improvements
- monitoring/context_pb2.py: upgraded version since previous has no contextId fields.