Added SLA availability as percentage.

Slice Grouping

See merge request !64

- Added indexes recommended by Cockroach internal planner to boost performance
- Added extra foreign-key indexes to enhance constraint validation

- Removed manual changes in my_deploy.sh

- Removed unneeded README.md file

- Updated number of 9's for availability

Minor cosmetic change in Hackfest/Mock OSM tool

See merge request !65

- Added new field availability in SLA Availability update

- Minor code cleanup

- Updated number of 9's for availability

- Updated number of 9's for availability

- Disabled slice grouping by default

feat/xr_device_driver_service_tool

See merge request !63

- Added indexes recommended by Cockroach internal planner to boost performance

Add relese/2.0.1 fixes

See merge request !62

- Added close connection to enable load balancing in requests

- Added availability percentage to SLA Availability constraint

- Removed availability percentage from SLA Availability constraint (new feature)

- Added availability percentage to SLA Availability constraint

- Added availability percentage to SLA Availability constraint

- Added availability percentage to SLA Availability constraint

- Removed availability percentage from SLA Availability constraint (new feature)

- Removed availability percentage from SLA Availability constraint (new feature)

- Removed availability percentage from SLA Availability constraint (new feature)

Addition of bindings for YANG "IETF Slice Service" data model parsing
Refactoring of subfolder "tools"

- Reduced number of digits to 2 in SLA values

- Rounded SLA values to 2 decimal digits

- Extracted constant MAX_WORKER_THREADS
- Rounded SLA values to 2 decimal digits

- Corrected method UnsetSlice to remove constraints

- Added logic to manage endpoints, constraints and config rules in Slice Grouping