Task #9351: initial skeleton for cleanup service, test and cmdline tool

.gitattributes

CMake/LofarPackageList.cmake

SAS/CMakeLists.txt

SAS/DataManagement/CMakeLists.txt

SAS/DataManagement/CleanupService/CMakeLists.txt

SAS/DataManagement/CleanupService/__init__.py

SAS/DataManagement/CleanupService/cleanup

SAS/DataManagement/CleanupService/cleanupservice

SAS/DataManagement/CleanupService/cleanupservice.ini

SAS/DataManagement/CleanupService/config.py

SAS/DataManagement/CleanupService/rpc.py

SAS/DataManagement/CleanupService/service.py

SAS/DataManagement/CleanupService/test/CMakeLists.txt

...ement/CleanupService/test/test_cleanup_service_and_rpc.py

...ment/CleanupService/test/test_cleanup_service_and_rpc.run

...ement/CleanupService/test/test_cleanup_service_and_rpc.sh