- Updated wait loop time

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

- Added timestamp to logs
- Improved algorithm execution logs
- Added basic support for multi-layer path computation
- Improved KDisjointPath Algorithm with basic multi-layer support
- Minor improvements in backend request composition
- Removed unneeded code for unitary tests
- Added OLS-flavoured unitary test scenario

- Arranged GitLab CI/CD
- Added log messages

- Arranged ports in GitLab CI/CD unitary tests
- Added env-var dump for tests

- initial skeleton (not functional)

- Migrated to use new generic gRPC servicer
- Migrated to use new generic Rest servicer
- Migrated to use new settings framework
- Minor code formatting/styling

Common:
- added chk_attribute to type_checkers module.
- recovered run_tests_locally.sh

Compute:
- updated requirements.in
- updated Config.py
- updated RestServer
- implemented IETF-L2VPN NBI plugin
- implemented unitary tests for IETF-L2VPN NBI plugin including a Mock OSM client, and Mock Context and Service components

- Added REST API Server to Compute component
- Factorized get settings from environment variabes into common method get_setting

This reverts merge request !3

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