You're lucky! You can specify the URL in the WSDL URL for the drive elementFormDefault.
Add this to the WSDL URL:
elementFormDefault=qualified
... this is what the full URL looks like:
https://<instance name>.service-now.com/<table name>.do?WSDL&elementFormDefault=qualified
, WSDL XML :
<xsd:schema elementFormDefault="qualified"