Merge branch 'L2SS-630-refactor-functions-graded-c' into 'master'

...ncontrol/tangostationcontrol/clients/statistics_client.py

...tationcontrol/tangostationcontrol/common/lofar_version.py

tangostationcontrol/tangostationcontrol/devices/apsct.py

...l/tangostationcontrol/devices/sdp/statistics_collector.py

...angostationcontrol/statistics_writer/statistics_writer.py

...rol/tangostationcontrol/test/clients/test_attr_wrapper.py

...trol/tangostationcontrol/test/clients/test_snmp_client.py

...ostationcontrol/test/devices/test_statistics_collector.py

tangostationcontrol/tangostationcontrol/toolkit/archiver.py

...ationcontrol/tangostationcontrol/toolkit/archiver_util.py