Merge branch 'develop' of https://gitlab.com/teraflow-h2020/controller into feat/microk8s-deployment

- re-generated python code from proto files

- moved README file to tutorial folder
- solved minor code issue with slice removal placeholder

- added section in deployment for deploy and log inspection, and troubleshooting
- extended list of experiments with placeholders for pending experiments
- updated Table of Content in README.md

- corrected device and endpoint names
- corrected bearer definitions
- deleted unneeded/redundant scripts
- removed code coverage from test executions
- added separate script for test and code coverage
- moved OFC'22 README to the tutorial folder

Policy/minimize policy ci runtime

See merge request teraflow-h2020/controller!125

- removed unneeded comments from run_tests_locally*.sh in scripts folder
- minor improvement in report_coverage_all.sh
- added script to expose through the ingress controller the gRPC interfaces through the ingress controller for debug purposes

- moved OFC'22 helper scripts to show logs to main scripts folder and adapted to use scenario definition variables

- Extended WebUI to support its deployment on subpaths of a web-server
- Implemented a debug tab in WebUI

- moved old deployment scripts to scripts/old
- added NGINX-based ingress controller to expose http-based endpoints from a single connection point
- adapted webui K8s manifest to be used with the ingress controller
- improved install_requirements.sh (renamed from install_development_dependencies.sh) to prevent collision of package versions
- adapted script to show deployment
- created functional example settings script my_deploy.sh
- created improved deploy.sh script
- added first version of the deployment tutorial. Run Experiments and Development are work in progress.

Fix policy-related proto issues, unify in a single folder generated code for the different languages, and adapt generation scripts

See merge request teraflow-h2020/controller!124

- fixed issue with messages in policy.proto and context-policy.proto
- modified and unified script to generate Python code from proto files
- segregated script to generate UML code
- added/modified apropriate .gitignore files to prevent uploading generated code. It should be generated locally or during creation of Docker containers
- added symbolic link from common/proto to folder containing python generated code

Preliminary non-functional version of PathComp component

See merge request teraflow-h2020/controller!123

Multiple small improvements and bug fixes in WebUI

See merge request teraflow-h2020/controller!119

Extended Proto files:

See merge request teraflow-h2020/controller!122

Policy/update policy domain objects

See merge request teraflow-h2020/controller!116

chore(automation): update gRPC port name to grpc

See merge request teraflow-h2020/controller!121

chore(policy): update policy gRPC port name to grpc

See merge request teraflow-h2020/controller!120

- removed hardcoded paths and replaced by url_for methods
- arranged service paths to be homogeneous with other entities
- implemented service delete
- adapted JavaScript scripts to use dynamically generated paths from Jinja
- corrected error logger in delete of device and service
- implemented logic to support deploying the WebUI on a subpath of WSGI servers