The JarDeployer is rejecting this file within its accept method. In fact it is rejecting every jar with a file in the META-INF directory and the file extension .xml .
Well, I don't know hivemind and i don't know why they place a xml in META-INF, but I would report the JarDeployer behaviour as bug at sourceforge.
Thanks for your reply. It is a JarDeployer problem indeed as it is too restrictive to forbid any xml files in META-INF.