Service RecomputeConnections RPC method, Device Controller node pointer and Exclude Constraint

See merge request !107

- Updated retrieval of device controller in TaskExecutor
- Improved logging of RecomputeConnections RPC method
- Added random selection over best candidate paths
- Extended unitary test for RecomputeConnections RPC method to check subsecuent path changes
- Fixed TaskExecutor error message formatting

- Added field Controller to Device details

- Updated retrieval of device controller
- Updated deepness level of microwave devices/controllers

- Added logic to auto-enable devices when Automation component is not deployed
- Updated retrieval of device controller

- Added extensions in Device to point to the controller node of each device

- Added controller_id field in Device

- Corrected DAG dependencies in TaskScheduler compose_service_connection_update() method
- Corrected validation and update of new connection in RecomputeConnections RPC method

- Corrected generation of replies

- Updated KSP algorithm to support k-paths inspected and k-paths returned parameters

Merge branch 'develop' of https://labs.etsi.org/rep/tfs/controller into feat/service-recompute-path-rpc

- Replaced algorithm in gRPC method RecomputeConnections to use KSP

PathComp Backend - Adding Logs and kpaths_return

See merge request !100

Merge branch 'fix/pathcomp-backend-logs' of https://labs.etsi.org/rep/tfs/controller into fix/pathcomp-backend-logs

- Added KPath returned
- Modified path computation response to for K paths for a single service

- Updated my_deploy
- Updated test script for recompute connections RPC

- Activated debug for service and pathcomp

- Implemented unitary test for gRPC method RecomputeConnections

- Corrected SerializerTest issue with SERVICESTATUS_UPDATING and SERVICESTATUS_SLA_VIOLATED

- Implemented connection_to_string helper method
- Extended TaskScheduler with method compose_service_connection_update
- Implemented basic logic for gRPC method RecomputeConnections

- Fixed version of grpclib

- Added RecomputeConnections RPC to client and skeleton in servicer

- Added SERVICESTATUS_UPDATING and SERVICESTATUS_SLA_VIOLATED

- Added SERVICESTATUS_UPDATING and SERVICESTATUS_SLA_VIOLATED
- Added Constraint_Exclusions

- Added SERVICESTATUS_UPDATING

- context.proto: Added SERVICESTATUS_UPDATING
- context.proto: Added Constraint_Exclusions
- service.proto: Added RecomputeConnections RPC

- Minor fuction name fix

- Corrected Dockerfiles

- Minor improvements

- Improved SQLAlchemy engine and database initialization

- Updated wait loop time