echo the above +1. Maybe list out a few scenarios of running the tests.
Plus the -DxmlSuiteFile=..../..../test.Java.
I assume that they should be a default testXml path property for the user to override via mvn cmd 

This should be built in as part of the default pom out of the box for ease of use. 
Refer to my answer on stack exchange http://stackoverflow.com/a/13829933/1810439