Merge branch 'master' into cob-153

.gitattributes

.gitlab-ci.yml

.vscode/settings.json

CMake/LofarPackageList.cmake

CMake/variants/variants.cbm206

CMake/variants/variants.head01

Docker/lofar-ci/Dockerfile_ci_base

Docker/lofar-ci/Dockerfile_ci_lta

Docker/lofar-ci/Dockerfile_ci_scu

LCS/MessageBus/src/messagebus.py

LCS/Messaging/python/messaging/config.py

LCS/Messaging/python/messaging/messagebus.py

LCS/Messaging/python/messaging/rpc.py

LCS/Messaging/python/messaging/test/t_RPC.py

LCS/Messaging/python/messaging/test/t_messagebus.py

LCS/PyCommon/CMakeLists.txt

LCS/PyCommon/cep4_utils.py

LCS/PyCommon/database.py

LCS/PyCommon/dbcredentials.py

LCS/PyCommon/json_utils.py