- code styling and cleanup

- Corrected default values in unitary test config template
- Minor code styling

- solved minor bug with default openconfig operations.

- OpenConfigDriver: code cleanup and added default values

- Updated default OpenConfig unitary test template config
- Added minor code improvements in OpenConfig Driver

- OpenConfigDriver migrate from netconf_client to ncclient library
- Clean integration of Candidate datastore
- OpenConfigDriver code cleanup

- Implemented support for ACLs
- Added suport for Candidate datastore

new development of microwave device - implemented the Api to get configurations, create and delete services

Signed-off-by: Georgios Katsikas <katsikas.gp@gmail.com>