- Enabled gRPC Reflection
- Added scripts to inspect core gRPC components

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

- reviewing integration with CockroachDB
- reviewing context REST API
- reviewing database schema
- reviewing code

Lacks events.

Signed-off-by: mansoca <carlos.manso@cttc.es>

- Arranged .gitignore & .gitkeep files in common proto folder
- Created specific run_tests_locally script for Context component
- Moved imports from *.proto folder to common.proto folder
- Adapted common.tools.object_factory to new proto definitions for ConfigRule and Constraint
- Extended common.tools.type_checkers to new proto definitions for ConfigRule and Constraint
- Removed context's genproto.sh script
- Adapted Events generated to new timestamp data type
- Minor code and linting fixing

- Migrated to use new generic gRPC servicer
- Migrated to use new generic Rest servicer
- Migrated to use new settings framework

- Corrections in Service to prevent errors in GitLab CI/CD pipeline.
- Minor improvements in random classes.

- Final version of Context service ready for integration tests
- Integrated REST API read-only methods
- Updated test units for gRPC and REST API interfaces
- Improved flag for pre-populating database with fake testing data
- Combined Redis within Context POD

Common:
- Renamed common.metrics to common.rpc_method_wrapper
- Moved ServiceException to common.rpc_method_wrapper
- Implemented High-Level ORM methods to simplify Database handling

Context:
- Added flag to auto-populate fake data for testing purposes
- Added fake objects for testing purposes
- Minor corrections in ORM Database Models
- Reimplemented gRPC Servicer methods using HighLevel ORM helper methods
- Implemented complete unit testing of gRPC Servicer
- Added Message Broker to enable distribution of database events
- Implemented gRPC GetEvents methods
- Modified default config values to support larger number of persistent connections for events streaming
- Reimplemented Context REST Resource to re-use gRPC Servicer and prevent duplicating code

Automated Tests:
- Reactivated common and context unit tests

- Complete rework of Database API
- Integration of Database API into Context
- Improvement of API

This commit is not a final implementation, just an intermediate backup.

This reverts merge request !3

Move database to common folder, since it will be used also by device service, and implement very minor changes.