- slice retrieval helper functions added
- copy_config_rules function changed to support raise_if_differs in arguments
- deepdiff added to to service component requirements
- slice retrieval by slice name added in create_update function of slice service

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

- updated method to update config rules and support action updates

- added helper methods to copy/update grpc messages: config_rules, constraints, endpoint_ids, service_ids
-  extended Context ConstraintModel to support different types of constraints
- extended EndpointModel with get_endpoint helper method
- extended SliceModel to incorporate config rules