Merge branch 'L2SS-199-remove-asyncua' into 'master'

L2SS-199: Remove asyncua requirement as it's unused. Upgrade opcua lib requirement to 0.98.13.

Closes L2SS-199

See merge request !52

bootstrap/etc/requirements.txt

@@ -5,5 +5,5 @@ numpy
 opcua-client
 pyqtgraph
 PyQt5
-asyncua
+opcua >= 0.98.13
 dataclasses

docker-compose/itango/lofar-requirements.txt

 parso == 0.7.1
 jedi == 0.17.2
-opcua >= 0.98.9
-asyncua
+opcua >= 0.98.13
 astropy 
 python-logstash-async
 gitpython