- disabled DLT by default

- added support to record load-gen operations in DLT to take performance evaluation metrics
- improved mixed request support

- factorized recording methods
- implemented delete of record

- DLT connector: added flag to delete records

- removed incomplete DLT load gen tool

- improved object-factry slice-related methods

- new tool (under implementation) to trigger recording of entities in DLT and evaluate performance

- added support to request slices

- implemented RecordService method

- added close to pathcomp compute request to enforce load balancing of requests

- updated default config
- fixed issue with compatible dst endpoint selection

- updated histogram definition in Grafana dashboards
- updated prometheus queries

- added missing metrics ports in core services
- updated scalping time to 5 seconds

- added support for L3NM and TAPI services

- Improved endpoint type definition

- improved README file
- enabled configuration of histogram buckets
- updated emulated and openconfig device driver
- updated L2NM, L3NM and TAPI service handlers

- created new load generator tool to stress TeraFlowSDN
- added descriptor file to populate topologies
- added helper script to run it

- added missing headers

- updated replicas of service and pathcomp to 5
- temporarily disabled WebUI Grafana

- updated default decorator histogram buckets
- updated grafana dashboard pannel backups
- updated testing deploy script

- removed scaledown+scaleup during deploy (useless)

Backend:
- Increased number of allowed edges from 10 to 20

Frontend:
- reduced log levels for messages
- added mutex to prevent issuing multiple calls to the backend at the same time

- Increased default gRPC workers from 10 to 200
- added object factory methods for L2NM services

- moved manifests for service monitors

- added tool to load scenarios from descriptor files
- added README.md file
- added helper script
- added example descriptors

- updated grafana dashboard backups and prometheus queries

- unified RPC method wrapper with performance evaluation
- migrated components to new method wrapping API
- added new grafana dashboard backups

- corrected error in GetInstantKpi method

Add support in Context to persist Policies

See merge request !28

- pre-merge cleanup of policy persistence

- fix CI/CD pipeline unit tests

- pre-merge cleanup