Merge branch 'master' into TMSS-360

.gitlab-ci.yml

Docker/lofar-ci/Dockerfile_ci_sas

SAS/TMSS/docker-compose-ua.yml

SAS/TMSS/src/tmss/CMakeLists.txt

SAS/TMSS/src/tmss/settings.py

SAS/TMSS/src/tmss/tmssapp/CMakeLists.txt

SAS/TMSS/src/tmss/tmssapp/migrations/0001_initial.py

SAS/TMSS/src/tmss/tmssapp/models/CMakeLists.txt

SAS/TMSS/src/tmss/tmssapp/models/__init__.py

SAS/TMSS/src/tmss/tmssapp/models/scheduling.py

SAS/TMSS/src/tmss/tmssapp/models/specification.py

SAS/TMSS/src/tmss/tmssapp/populate.py

...app/schemas/UC1-scheduling-unit-observation-strategy.json

...chemas/scheduling_constraints_template-constraints-1.json

SAS/TMSS/src/tmss/tmssapp/serializers/specification.py

SAS/TMSS/src/tmss/tmssapp/viewsets/CMakeLists.txt

SAS/TMSS/src/tmss/tmssapp/viewsets/__init__.py

SAS/TMSS/src/tmss/tmssapp/viewsets/scheduling.py

SAS/TMSS/src/tmss/tmssapp/viewsets/specification.py

SAS/TMSS/src/tmss/urls.py