I have the driver in my standalone.xml: <subsystem xmlns="urn:jboss:domain:datasources:1.2">...
oops, copy & paste fail. This is the whole module.xml file: <?xml version="1.0" encoding="UTF-8"?>...
I think I have a similar or the same problem using EJBCA 6.1.1 and JBoss EAP 6.3...