Merge branch 'master' into TMSS-175

.gitlab-ci.yml

CMake/FindBoost.cmake

CMake/LofarPackageList.cmake

CMake/variants/variants.lcs157

COPYING

Docker/lofar-ci/Dockerfile_ci_base

Docker/lofar-ci/Dockerfile_ci_lta

Docker/lofar-ci/Dockerfile_ci_mac

Docker/lofar-ci/Dockerfile_ci_sas

Docker/lofar-ci/pvssInst.conf

Docker/lofar-pipeline/Dockerfile.tmpl

LCS/Messaging/python/messaging/messagebus.py

LCS/PyCommon/CMakeLists.txt

LCS/PyCommon/cep4_utils.py

LCS/PyCommon/json_utils.py

LCS/PyCommon/locking.py

LCS/PyCommon/test/postgres.py

LICENSE

...ver/LTAIngestAdminServer/lib/ingestjobmanagementserver.py

.../LTAIngestAdminServer/test/t_ingestjobmanagementserver.py