fix(nc): add conformance to OPC 10000-6
fix(nc): add conformance to OPC 10000-6

Add correct parsing of enumerations encoded as strings: <symbol>_<value>

jpfr/open62541,JGrothoff/open62541,StalderT/open62541,open62541/open62541,open62541/open62541,jpfr/open62541,JGrothoff/open62541,open62541/open62541,StalderT/open62541,open62541/open62541,JGrothoff/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541,StalderT/open62541,jpfr/open62541