Failure in the XPath of the test supportedStoredQueryLanguages

[lgoltz]

The test supportedStoredQueryLanguages currently fails with the exception "Missing 'language' parameter for CreateStoredQuery."

Here the relevant part of the capabilities:

    <ows:Operation name="CreateStoredQuery">
      <ows:DCP>
        <ows:HTTP>
          <ows:Get xlink:href="http://localhost:8080/deegree-webservices/services/wfs?"/>
          <ows:Post xlink:href="http://localhost:8080/deegree-webservices/services/wfs"/>
        </ows:HTTP>
      </ows:DCP>
      <ows:Parameter name="language">
        <ows:AllowedValues>
          <ows:Value>urn:ogc:def:queryLanguage:OGC-WFS::WFSQueryExpression</ows:Value>
         </ows:AllowedValues>
      </ows:Parameter>
    </ows:Operation>

As far as I see the XPath in https://github.com/opengeospatial/ets-wfs20/blob/master/src/main/java/org/opengis/cite/iso19142/querymgmt/StoredQueryManagement.java is incorrect.
Instead of
//ows:Operation[name='CreateStoredQuery']/ows:Parameter[@name='language']
it should be
//ows:Operation[@name='CreateStoredQuery']/ows:Parameter[@name='language']