Merge branch 'L2SS-412-replace-opcua-by-asyncua' into 'master'

.gitlab-ci.yml

bootstrap/etc/requirements.txt

devices/clients/attribute_wrapper.py

devices/clients/comms_client.py

devices/clients/docker_client.py

devices/clients/opcua_client.py

devices/clients/statistics_client.py

devices/common/lofar_logging.py

devices/devices/docker_device.py

devices/devices/hardware_device.py

devices/devices/opcua_device.py

devices/devices/sdp/sst.py

devices/devices/sdp/statistics.py

devices/devices/sdp/xst.py

devices/integration_test/base.py

devices/integration_test/client/test_sdptr_sim.py

devices/integration_test/client/test_unb2_sim.py

devices/integration_test/devices/test_device_sdp.py

devices/test-requirements.txt

devices/test/base.py