EAP 5.3.0 clustering tests break on Windows due to Windows's inability to handle commands longer than 8k chars

W:\workspace\eap-5.3.x-JDK6-Win-matrix-CI\ef0c0207\jboss-eap-5.3.x\testsuite\build.xml:1733: The following error occurred while executing this line:
W:\workspace\eap-5.3.x-JDK6-Win-matrix-CI\ef0c0207\jboss-eap-5.3.x\testsuite\imports\config\tests-clustering.xml:110: The following error occurred while executing this line:
W:\workspace\eap-5.3.x-JDK6-Win-matrix-CI\ef0c0207\jboss-eap-5.3.x\testsuite\imports\config\tests-clustering.xml:192: The following error occurred while executing this line:
W:\workspace\eap-5.3.x-JDK6-Win-matrix-CI\ef0c0207\jboss-eap-5.3.x\testsuite\imports\config\tests-clustering.xml:214: The following error occurred while executing this line:
W:\workspace\eap-5.3.x-JDK6-Win-matrix-CI\ef0c0207\jboss-eap-5.3.x\testsuite\imports\config\tests-clustering.xml:639: Process fork failed.
...
Caused by: java.io.IOException: CreateProcess error=206, The filename or extension is too long