EmitterNameAdditional enums not supported in EmitterSystem

[arttu-salminen-insta-fi]

EmitterSystem supports EmitterName enums, but not EmitterNameAdditional enums which cover part of all the enums defined in the standard. This means that enums which are part of EmitterNameAdditional cannot be put into EmitterSystem. Also, during unmarshall of EmitterSystem with an enum that is in the range EmitterNameAdditional covers, a null value is set to the systems emitterName attribute.