Merge branch 'master' into L2SS-235-Archive-PCC-attribute

devices/clients/attribute_wrapper.py

devices/clients/opcua_client.py

devices/clients/udp_receiver.py

devices/devices/hardware_device.py

devices/devices/pcc.py

devices/devices/sdp/sdp.py

devices/examples/snmp/snmp_client.py

devices/test/clients/test_attr_wrapper.py

devices/test/clients/test_client.py

devices/test/devices/test_device.py

devices/util/__init__.py

jupyter-notebooks/SDP_notebook.ipynb