DLT component sync between connector & gateway for initial integration test

See merge request teraflow-h2020/controller!134

- Implemented MockServicerImpl_DltGateway
- Updated Objects for unitary tests

- Implemented DLTConnectorClient and DLTGatewayClient
- Implemented DLTConnectorService skeleton

Merge branch 'develop' of https://gitlab.com/teraflow-h2020/controller into feat/dlt-component-connector

Arranged ConfigRules in WebUI component and OFC'22 functional test

See merge request teraflow-h2020/controller!131

- Corrected device descriptors to take into consideration new ConfigRules.

- Corrected templates to take into consideration new ConfigRules.

Fix for WebUI tests

See merge request teraflow-h2020/controller!130

Adapted various components to common proto folder and corrected various errors

See merge request teraflow-h2020/controller!129

- Moved imports from *.proto folder to common.proto folder
- Removed DLT Connector's genproto.sh script

- Moved imports from *.proto folder to common.proto folder
- Removed webui's genproto.sh script
- Minor code and linting fixing
- Arranged requirements to accelerate Docker image creation
- Updated Dockerfile
- Arranged GitLab CI/CD pipeline
- Corrected usage of ConfigRules to use new custom ConfigRules
- Moved config variables to new config framework
- Removed unneeded Config variables

- Moved imports from *.proto folder to common.proto folder
- Removed pathcomp's genproto.sh script
- Minor code and linting fixing
- Arranged requirements to accelerate Docker image creation
- Updated Dockerfile
- Arranged GitLab CI/CD pipeline

- Updated Dockerfile

- Moved config variables to new config framework
- Removed unneeded Config variables

- Corrected usage of ConfigRules to use new custom ConfigRules

- Corrected usage of ConfigRules to use new custom ConfigRules

- Moved imports from *.proto folder to common.proto folder
- Removed interdomain's genproto.sh script
- Minor code and linting fixing
- Arranged requirements to accelerate Docker image creation
- Updated Dockerfile
- Arranged GitLab CI/CD pipeline

- Moved imports from *.proto folder to common.proto folder
- Removed slice's genproto.sh script
- Minor code and linting fixing
- Arranged requirements to accelerate Docker image creation
- Updated Dockerfile
- Arranged GitLab CI/CD pipeline

- Moved imports from *.proto folder to common.proto folder
- Removed compute's genproto.sh script
- Minor code and linting fixing
- Arranged requirements to accelerate Docker image creation
- Updated Dockerfile
- Arranged GitLab CI/CD pipeline

Adapted Service to common proto folder

See merge request teraflow-h2020/controller!128

- Added missing requirement in Service
- Removed unneeded requirements.txt in Context

- Moved imports from *.proto folder to common.proto folder
- Removed service's genproto.sh script
- Minor code and linting fixing
- Arranged requirements to accelerate Docker image creation
- Updated Dockerfile
- Arranged GitLab CI/CD pipeline
- Corrected usage of ConfigRules to use new custom ConfigRules
- Removed redundant/unused Tools file in service_handlers

Adapted Device(complete) & Monitoring(partial) to common proto folder

See merge request teraflow-h2020/controller!127

- arranged import of per-component proto to common proto

Common:
- Corrected Python package versions to prevent collisions with p4runtime

Context:
- Minor corrections in GitLab CI/CD pipeline

Device:
- Corrected Python package versions to prevent collisions with p4runtime

Monitoring:
- Arranged requirements to accelerate Docker image creation
- Corrected Python package versions to prevent collisions with p4runtime
- Updated Dockerfile
- Arranged GitLab CI/CD pipeline