- fix wrong import of TaskScheduler in _ServiceHandlerAPI interface and related files

fix(automation): ztpUpdate loop resolved

See merge request !6

Signed-off-by: Georgios P. Katsikas <gkatsikas@ubitech.eu>

- Removed deprecated Database Model within Service
- Corrected constructor signature of ServiceHandler interface
- Removed unneeded file in L3NMEmulated Service Handler
- Removed unused imports from TAPI Service Handler

- Removed deprecated PathComputationElement class
- Migrated old L3NMOpenConfig Service Handler to the new framework
- Removed unneeded file in L3NMEmulated Service Handler

OpenConfig Driver:
- added default endpoint type in case it cannot be retrieved from the remote device
- corrected network_instance/edit_config.xml template; wrong XML format

feat(policy): policy rule add/update/delete RPCs

See merge request !3

- Added basic support for ACL rules
- Corrected unitary tests

- solved bug with JSON descripotor file load.

WebUI:
- added icons for optical roadm and optical transponder

Common:
- added missing device types

Device:
- added missing emulated device driver mappings

Common:
- added device type for emulated pakcet switches

PathComp:
- added layer mapping for emulated pakcet switches

- Fixed endpoint UUIDs of OLS device, otherwise cleanup crashes due to different endpoint UUIDs randomly generated.
- Fixed create/delete service tests

- Corrected delete config rules in L2NMEmulated/L3NMEmulated/TAPI Service Handlers.
- Commented unneeded settings in L2NMEmulatedServiceHandler Config Rules

- added wait control while MonitoringDB is starting

- Implemented generic MutexQueues class
- Implemented sequentialization of operations in Device component to prevent data corruption and race conditions

- Added script to generate topologies and services using DC_CSGW_OLS
- Corrected script to generate topologies and services using DC_CSGW_TN_OLS
- Corrected resources imported by functional tests

- corrected components imported by the tests and default my_deploy.sh

- corrected deployment name in manifest file
- added resource requests and limits for monitoring server container

- Activated "Grafana" link in top menu
- Implemented onboarding of devices + configuration from JSON descriptor files
- added device status in device details page
- created new grafana dashboard for new PostgreSQL-based monitoring database
- updated deploy.sh script with correct configuration of Grafana monitoring datasource and new dashboard

Device:
- fixed problem with subscription handling

- Improved look & feel of service and slice pages.

Common:
- added slice to EventTools

OFC'22 tests:
- corrected OFC'22 delete service test to identify appropriate service to be deleted
- removed usage of events for testing

Compute:
- remove diversity constraint when not populated

Device:
- removed unused field in database and code polishing

Service:
- migrated L3NMEmulatedServiceHandler to the new API
- polishing of code

Second part of harmonizing L2NM and L3NM according to the latest changes. Small fixes around the code.

Including missing components to the list of components in the my_deploy.sh file and including generating gRPC Python code to the OFC'22 tutorial.

- 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

- corrected endpoint identifiers in bearer definitions in Compute

- adding deploy of slice component
- homogeneized bearer definitions in Compute

Fix/ofc22 tests

See merge request teraflow-h2020/controller!193