Proto:
- Minor corrections in context.proto

Common:
- Minor corrections in common.orm.backend
- Improved definition of orm.Model class with get_instances and get_references
- Extended ORM unitary tests with get_instances and get_references

Context:
- Implemented missing methods in ContextClient
- Started to implement new Context data models using ORM.
- ContextModel functional using ORM and gRPC.
- Arranged old code file placing

- Added servicer RPC methods using new metrics framework.

- Added methods to automate metric class generation
- Added decorator for servicer RPC methods to add metering and logging features automatically
- Added unit tests
- Minor imptovements in context unit testing

- Extended database API with novel ORM
- Carrying out tests over ORM and InMemoryDB
- Foreign Keys need more testing

- Context Database API and ORM rework in progress

- Complete rework of Database API
- Integration of Database API into Context
- Improvement of API

This commit is not a final implementation, just an intermediate backup.

Skeleton implementation of the centralized cybersecurity component

See merge request teraflow-h2020/controller!19

Fixing two issues with the previous commit: i) obtaining the correct service gRPC port; ii) updating the gitlab ci file to use the correct service port.

Modifying the test and coverage execution files to accommodate the case where...

See merge request teraflow-h2020/controller!21

Integrate implementation of Device Driver API and minor common improvements

See merge request teraflow-h2020/controller!22

Including the dependencies of all components into the development dependencies.

See merge request teraflow-h2020/controller!20

- 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

Modifying the test and coverage execution files to accomodate the case where the project is located in any folder.

This commit is just a backup.

Added REST API Server to Compute component

See merge request teraflow-h2020/controller!17

- 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 in component.

See merge request teraflow-h2020/controller!16

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

fix: change naming convention of rpc methods from snake case to camel case

Changelog:

- GetStream_kpi method changed to GetStreamKpi inside monitoring.proto.

- All names of rpc methods inside compute.proto changed from snake case to camel case.

FYI @caslanoglou @vapostolopoulos

See merge request teraflow-h2020/controller!14

Merge feat/kubernetes-integration into develop

See merge request teraflow-h2020/controller!15