Merge branch 'develop' of https://gitlab.com/teraflow-h2020/controller into feat/ecoc22-dc-interconnect-disjoint

Multiple changes in Context component:

See merge request teraflow-h2020/controller!175

Common:
- Extended context proto with 2 methods: UnsetService and UnsetSlice

Context component:
- Added timestamp to logs
- Added methods UnsetService and UnsetSlice to Context client
- Implemented methods UnsetService and UnsetSlice in Context servicer
- Resolved conflict between service and slice entities with constraints and configrules

Merge branch 'develop' of https://gitlab.com/teraflow-h2020/controller into feat/ecoc22-dc-interconnect-disjoint

PathComp component improvements

See merge request teraflow-h2020/controller!174

Merge branch 'feat/pathcomp-component-frontend' of https://gitlab.com/teraflow-h2020/controller into feat/pathcomp-component

Merge branch 'feat/pathcomp-component-backend' of https://gitlab.com/teraflow-h2020/controller into feat/pathcomp-component

- Added timestamp to logs
- Improved algorithm execution logs
- Added basic support for multi-layer path computation
- Improved KDisjointPath Algorithm with basic multi-layer support
- Minor improvements in backend request composition
- Removed unneeded code for unitary tests
- Added OLS-flavoured unitary test scenario

- Increased number of supported topology nodes.
- To be improved with dynamic memory.

Merge branch 'feat/webui' of https://gitlab.com/teraflow-h2020/controller into feat/ecoc22-dc-interconnect-disjoint

Main page:
- Change page title to "ETSI TeraFlowSDN Controller"
- Add slogan "Open Source for Smart Networks and Services" next to the logo (on top)
- Change Logo and Icon

About page:
- Change title to "ETSI TeraFlowSDN Controller"
- Remove link "TeraFlow H2020 webpage" and add link "ETSI Open Source Group for TeraFlowSDN" pointing to: https://tfs.etsi.org/
- Remove partners logo

Service detail page :
- Show correct Service Type instead of integer
- Show service status
- Format configurations as in device details
- Format constraints as in device details
- Add constraints
- Format endpoints and add device uuid

Service page:
-Remove constraints

Link detail page:
-Add device uuid to the endpoints table

- Renamed OldBigNet scenario to BigNet
- Updated JSON descriptor builder scripts
- Generated descriptor files for scenario
- Updated definition of functional tests

Merge branch 'develop' of https://gitlab.com/teraflow-h2020/controller into feat/ecoc22-dc-interconnect-disjoint

Context/Device/Service/PathComp/tests/WebUI component fixes and improvements

See merge request teraflow-h2020/controller!173

- Renamed DependencyResolver to TaskScheduler
- Enhanced TaskScheduler with an extensible Task API framework and extensible dependency resolver
- Created TaskExecutor providing an extensible task execution environment
- Removed in-memory database; now is stateless and interrogates/updates Context when needed
- Extended gRPC servicer to use new TaskScheduler
- Removed unneeded files and re-organized helper methods
- Extended ServiceHandlerAPI; now SetEndpoint/DeleteEndpoint enables to configure/deconfigure a connection
- Moved ServiceHandlerFactory-related methods to the appropriate file
- Created ConnectionExpander to resolve from ERO-like paths to lists of links
- Created basic tasks: ServiceSetState, ServiceDelete, ConnectionConfigure, ConnectionDeconfigure
- Added skeleton for L2NMEmulatedHandler (to be adapted, now is a copy of L3NM one)

- Added methods to copy endpoints, constraints and config rules from request to slice stored in Context component.

- Improved formatting of scenario DC-CSGW-TN
- Created clone of scenario DC-CSGW-TN including OLS
- Cleaned up bootstrap and delete service unitary tests
- Renamed device type OPTICAL_LINE_SYSTEM to OPEN_LINE_SYSTEM

- Updated endpoint mapping for ECOC'22 scenario
- Swapped get-service and get-slice methods to priorize slices over services

- renamed device type OPTICAL_LINE_SYSTEM to OPEN_LINE_SYSTEM

Common:
- renamed device type OPTICAL_LINE_SYSTEM to OPEN_LINE_SYSTEM
- added DATACENTER and EMULATED_DATACENTER device types.

Context:
- modified service constraints for test object to use nomenclature "metric[unit]"
- corrected ConstraintModel dump methods

Device:
- uncommented dump methods in database ContextModel and TopologyModel

OFC'22 / OECCPSC'22 tests:
- renamed device type OPTICAL_LINE_SYSTEM to OPEN_LINE_SYSTEM

WebUI:
OFC'22 / OECCPSC'22 tests:
- renamed device type OPTICAL_LINE_SYSTEM to OPEN_LINE_SYSTEM

- added object factory method for emulated datacenters

- Fixed instantiation parameters in Dockerfile

Common:
- Added missing object factory methods for constraints

Context:
- Adapted unitary tests to new constraint object factory methods

Service:
- Adapted unitary tests to new constraint object factory methods

PathComp-Backend:
- Deactivated health probes since it causes problems in backend REST server

PathComp-Frontend:
- Correct unitary test constraints for SP algorithm
- Adapted unitary tests to new constraint object factory methods
- Fixed instantiation of ShortestPath and KDisjointPath Algorithms
- Ignore unknown constraints in Algorithm request composition

Frontend:
- added show logs script
- improved config settings to get address and port of the backend
- improved logging of _Algorithm
- implemented KDisjointPath logic

Backend:
- added show logs script

Merge branch 'feat/pathcomp-component' of https://gitlab.com/teraflow-h2020/controller into feat/ecoc22-dc-interconnect-disjoint

- Fix CI/CD pipeline

- correct unitary test constraints for SP algorithm

- Fix CI/CD pipeline
- Correct log argument to make it screen-only
- Remove old data files
- Activate health probes

Merge branch 'feat/webui' of https://gitlab.com/teraflow-h2020/controller into feat/ecoc22-dc-interconnect-disjoint

- corrected constraint display in service list page
- added list of connections related to service in detail page
- added detail of links
- improved look and feel of device detail page
- added feature of loading services through  JSON file

Adding friendly traces for debugging purposes in the process of parsing the context JSON

- Added support of the GET method to check status of PathComp
-Added support for showing logs via either Screen (stdout) or defined Log file

Merge branch 'feat/pathcomp-component-frontend' of https://gitlab.com/teraflow-h2020/controller into feat/ecoc22-dc-interconnect-disjoint

- Added deploy script used for tests

- Finished implementation of KDisjointPath algorithm
- Adjusted Algorithm interface
- Moved documentation and example test commands to misc folder