- 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

- 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

Common:
- Added missing object factory methods for constraints

Context:
- Adapted unitary tests to new constraint object factory methods

Service:
- Adapted unitary tests to new constraint object factory methods

PathComp-Backend:
- Deactivated health probes since it causes problems in backend REST server

PathComp-Frontend:
- Correct unitary test constraints for SP algorithm
- Adapted unitary tests to new constraint object factory methods
- Fixed instantiation of ShortestPath and KDisjointPath Algorithms
- Ignore unknown constraints in Algorithm request composition

Common:
- temporarily added backend to pathcomp service for debug purposes

Proto:
- Added KDisjointPath Algorithm to pathcomp proto

Frontend:
- refactored Servicer to cope with multiple algorithms
- added implementation of ShortestPath algorithm
- added implementation of KShortestPath algorithm
- added implementation of KDisjointPath algorithm (partial)
- moved PathComp servicer tools to algorithms subfolder
- added new unitary test scenario (DC's with CellSiteGWs and Transport Network) to validate KDisjointPath algorithm

Unitary test:
- Corrected Objects definition
- Added devices and links to topology

Frontend component:
- Implemented parsing of backend reply and composition of front-end reply
- Other minor arrangements

Common:
- added helper scripts

FrontEnd:
- corrected import paths
- added missing parameters in test
- refined creation of backend request

- added test-deploy.sh script
- partial arrangement of GitLab CI/CD
- added configuration constants
- arranged Dockerfile
- corrected imports of proto Python files
- implemented composition of backend request

- Partial implementation of request composer