XR Device Driver consistency/life cycle management

See merge request !39

Performance Evaluation Framework + Helper Tools

See merge request !36

- added results

- added support for microwave services
- removed DLT from default list of components
- added support to re-use endpoints in a single device for multiple connections

- corrected service resource keys
- corrected endpoint count in set/delete endpoint methods

- added support for user/pass basic authentication
- added HTTP schema settings
- added field to filter desired underlying devices under management
- corrected endpoint uuid composition
- improved error handling
- improved retrieval of existing services

- removed incorrect instruction

Update monitoring protobuf uml

See merge request !38

- Added missing L2NM-OpenConfig Service Handler

XR Device Driver update for newer IPM and update for tests to work with current Tera Flow version

See merge request !35

- 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