TMSS-272: merged master into this feature branch

.gitlab-ci.yml

Docker/lofar-ci/Dockerfile_ci_sas

LTA/sip/lib/CMakeLists.txt

LTA/sip/lib/constants.py

LTA/sip/lib/constants_generator.py

LTA/sip/lib/feedback.py

LTA/sip/lib/ltasip.py

LTA/sip/lib/query.py

LTA/sip/lib/siplib.py

LTA/sip/lib/testmetadata_file.Correlated.modified

LTA/sip/lib/validator.py

LTA/sip/lib/visualizer.py

LTA/sip/test/CMakeLists.txt

LTA/sip/test/sipfrommom.xml

LTA/sip/test/test_feedback.py

LTA/sip/test/test_siplib.py

LTA/sip/test/test_validator.py

LTA/sip/test/test_visualizer.py

LTA/sip/test/testmetadata_file.Correlated.modified

LTA/sip/test/valid_sip.xml