SW-816: merged origin/LOFAR-Release-4_0

LCS/PyCommon/dbcredentials.py

LCS/PyCommon/postgres.py

LCS/PyCommon/test/t_postgres.py

MAC/Services/src/ObservationControl2.py

SAS/ResourceAssignment/Common/lib/specification.py

...ourceAssignment/ResourceAssigner/lib/resource_assigner.py

...ent/ResourceAssigner/lib/resource_availability_checker.py

SAS/ResourceAssignment/ResourceAssigner/lib/schedulers.py

.../ResourceAssigner/test/t_resource_availability_checker.py

...rceAssignment/ResourceAssigner/test/t_resourceassigner.py

SAS/ResourceAssignment/ResourceAssigner/test/t_schedulers.py

...ourceAssignment/ResourceAssignmentDatabase/CMakeLists.txt

SAS/ResourceAssignment/ResourceAssignmentDatabase/radb.py

...ssignmentDatabase/radb/sql/add_functions_and_triggers.sql

...ssignment/ResourceAssignmentDatabase/tests/CMakeLists.txt

...t/ResourceAssignmentDatabase/tests/radb_common_testing.py

.../ResourceAssignmentDatabase/tests/t_radb_functionality.py

...nt/ResourceAssignmentDatabase/tests/t_radb_performance.py

SAS/ResourceAssignment/ResourceAssignmentService/rpc.py

SAS/ResourceAssignment/ResourceAssignmentService/service.py