- Implemented Debug API
- Implementing unitary debug API tests

- updated OFC'22 test scripts with source of env variables
- activated DEBUG logs in Device and Service components
- added Slice as dependency of Compute
- removed creation of services in Compute, all goes through Slice
- Added missing default constraints in PathComp Frontend
- added logic in Slice to identify if its L2 or L3

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

- 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.