xs namespace missing in DocumentMetadataHandle.getProperties()

[sammefford]

The following generates invalid XML because it's missing the xs namespace declaration:

 DocumentMetadataHandle metadataHandle = new DocumentMetadataHandle();
 DocumentMetadataHandle.DocumentProperties props = metadataHandle.getProperties();
 properties.put(QName.valueOf("test"), "test");
 System.out.println("Invalid XML: " + metadataHandle);

[sammefford]

Looks like this only happens when the following is in the pom.xml, presumably because woodstox is not as good at Java's default XMLStreamWriter at noticing there's an xsi:type attribute so we'll also need the xs namespace:

    <dependency>
      <groupId>org.codehaus.woodstox</groupId>
      <artifactId>woodstox-core-asl</artifactId>
      <version>4.4.1</version>
    </dependency>