Merge in XRCA/teraflow from vhallivu/update_cm_authentication to xr_development

Squashed commit of the following:

commit 6a7069ded9b899afe4c9a218f1062da5c69782e4
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Fri Aug 12 07:51:32 2022 +0300

    review + lint fixes

commit f02d6f4ce42f909067a2570daff136e1ed0c7bbd
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Thu Aug 11 14:39:12 2022 +0300

    XR connection delete support

commit 81c3aae5ba105f6650f5392f438200c4b505eea1
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Thu Aug 11 12:39:29 2022 +0300

    Create services to CM

commit 56b3fb3acfc3281b3b3136269163697ca679913c
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Thu Aug 11 11:17:28 2022 +0300

    Improved connection management code, code refactoring

commit 46ef072679ffd37c22c4bf959bb8ba009cf4a082
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Wed Aug 10 17:30:27 2022 +0300

    More support for connection management

commit 49a2762abd7c1c8adafd666624b31976281d3860
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Wed Aug 10 15:52:17 2022 +0300

    Refactored CM connection, now using CM if database

commit 1b404f2c10befeecb48a7a2278f5e9ec60c25d9a
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Wed Aug 10 14:14:03 2022 +0300

    Start of refactoring of CM connectivity

commit 8ec8251bafbba559a4881e50be0aa068340fe536
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Tue Aug 9 16:37:49 2022 +0300

    Improved CM authentication

Merge in XRCA/teraflow from vhallivu/XR_DRIVER_EMULATE_ENDPOINTS to xr_development

Squashed commit of the following:

commit da5b46937d8f0dd87f535e3d736dc1d9e2043e94
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Mon Aug 8 15:21:16 2022 +0300

    Updates to emulation

commit b9d9e566f4622f85767c85b72494fbb33896de60
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Mon Aug 8 13:49:55 2022 +0300

    Add XR constellation icon for topology

commit 6d24a643f11ecb684043332500c2ee8b2768e900
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Mon Aug 8 12:56:16 2022 +0300

    Improved XR service creation stubs

commit 7d31fd2ecc67848368e2d0eddb616faa6115128d
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Mon Aug 8 08:07:10 2022 +0300

    Eulation for XrDriver endpoints

Merge in XRCA/teraflow from vhallivu/XR_OPTICS_DRIVER_LOGIN_TO_CM to xr_development

Squashed commit of the following:

commit ba53d51d94c52491c4f70587187bf6746a9613da
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Fri Aug 5 13:26:40 2022 +0300

    Initial code for XR Device Driver, can connect to CM and acquire access token. No other functionality

refactor(policy): add validation at PolicyRuleDevice

See merge request teraflow-h2020/controller!161

refactor(policy): add validation at PolicyRuleService

See merge request teraflow-h2020/controller!160

refactor(policy): add validation at PolicyRuleCondition

See merge request teraflow-h2020/controller!159

- fixed parsing of custom rules in unitary tests

- Added missing log dump in unitary test

Common and Context changes:

See merge request teraflow-h2020/controller!157

- added exposition of redis-tests service for testing with Redis backend
- moved delete logic from Context Servicer to ORM components
- added support for constraints of different kinds

fix(policy): update ConstraintIsolationLevel object

See merge request teraflow-h2020/controller!158

refactor(policy): implement builder pattern for EndPoint

See merge request teraflow-h2020/controller!152

Automation/implement builder pattern for end point

See merge request teraflow-h2020/controller!151

- added helper methods to copy/update grpc messages: config_rules, constraints, endpoint_ids, service_ids
-  extended Context ConstraintModel to support different types of constraints
- extended EndpointModel with get_endpoint helper method
- extended SliceModel to incorporate config rules

Extended Context proto files with slice config rules, endpoint priority constraint, and modified isolation level constraint

See merge request teraflow-h2020/controller!156

- Slice: added config rules
- Added EndpointPriority constraint
- Modified IsolationLevel constraint to contain a repetition of items

Arranged deploy scripts

See merge request teraflow-h2020/controller!155

- corrected service name computation in expose_ingress_grpc.sh script
- corrected log format in deploy.sh script
- added control to configure Grafana only when both webui and monitoring are deployed

Added tutorial for debugging with VSCode

See merge request teraflow-h2020/controller!150

- added sections describing installation of Python Extension in VSCode
- added section describing how to export and test connectivity to services through gRPC

refactor(policy): change proto files names

See merge request teraflow-h2020/controller!154

refactor(automation): modify automation.proto to use context.Empty

See merge request teraflow-h2020/controller!153