debug: main service uuid added to the prefix of the hash function of the subservices, __post_init__ changed to a method tha is called in the code

- sub service creation code changed to avoid new sub service creation
  when multi-domain services are updated
- sub service creation code refactored with dataclass addition

- Added IP SDN Ctrl as a packet device in sub-service composer and resource groups
- Added logic to separate connections managed by intermediate SDN controllers

- Added logic to extrapolate underlyign connections for remote domains

- Added debug log messages in ComputeSubServices to track issues

- Renamed device "manager" to device "controller"

- Corrected endpoint-to-link datastructure
- Improved identification of config rules by device/endpoint uuid/name
- Assumed links are unidirectional
- Rewritten sub-serice computation logic to consider intermediate controllers
- Rewritten method eropath_to_hops based on new endpoint-to-link datastructure
- Minor bug resolutions
- Updated test pathcomp temporary code

- Added logic to ignore mgmt-related links
- Improved composition of subservice config rules
- Cleaned up Constants
- Updated sub-service computation logic

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

- assumed all services issued to backend are in admin context
- implemented logic to retrieve plain non-layered connection when layeted connection cannot be processed
- improved error reporting in EroPathToHops
- implemented logic to synthesize a dummy path for single-device service requests
- improved identification of interdomain pathcomp requests

- 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