Merge branch '2021-04-07-cleanup' into 'master'

deprecated/PCC/LICENSE.txt

deprecated/PCC/MANIFEST.in

deprecated/PCC/NOTICE

deprecated/PCC/PCC/PCC.py

deprecated/PCC/PCC/__init__.py

deprecated/PCC/PCC/__main__.py

deprecated/PCC/PCC/opcua_connection.py

deprecated/PCC/PCC/release.py

deprecated/PCC/PCC/wrappers.py

deprecated/PCC/README.rst

deprecated/PCC/requirements.txt

deprecated/PCC/setup.py

deprecated/PCC/test/PCC_test.py

deprecated/PCC/test/__init__.py

deprecated/PCC/test/test-PCC.py

deprecated/SDP/LICENSE.txt

deprecated/SDP/MANIFEST.in

deprecated/SDP/NOTICE

deprecated/SDP/README.rst

deprecated/SDP/SDP/SDP.py