- added unit testing into automated unit testing processes

- Finished preliminary implementation of Emulated Driver
- Emulated Driver uses APScheduler to emulate subscriptions
- Implemented basic unitary testing for Device Driver API
- Still pending to integrate Driver API within Device service

- Implemented GetConfig/SetConfig/DeleteConfig
- Implemented unit tests for GetConfig/SetConfig/DeleteConfig
- Implementing simple DiscriteEventSimulator to emulate monitoring
- Remains to implement SubscribeState/UnsubscribeState/GetState
- Remains to implement unit tests for SubscribeState/UnsubscribeState/GetState

This commit is just a backup.

- Added REST API Server to Compute component
- Factorized get settings from environment variabes into common method get_setting

Fix renaming of compute.proto methods from snake-case to camel-case. Added minor naming improvements.

Update the gitlab-ci.yml_generator.py file

Added python script to automatically generate a gitlab-ci.yml file

Common / Context / Device / Service:
- Improvements in unitary testing
- Extended assertion validators tor testing
- Factorized service implementation code to improve testability, reusability and increase code coverage

Factorization of code between services and minor unitary testing improvements. (Not finished, it is just a backup)