Tests are failing with:
javax.management.AttributeNotFoundException: not found: TransactionTimeout
at org.jboss.mx.server.AbstractMBeanInvoker.getAttribute(AbstractMBeanInvoker.java:335)
at org.jboss.mx.server.MBeanServerImpl.getAttribute(MBeanServerImpl.java:565)
at org.jboss.test.jca.test.TxConnectionManagerUnitTestCase.setUp(TxConnectionManagerUnitTestCase.java:128)

The "TransactionTimeout" attribute is obtained in the test set up method:
MBeanServer server = MBeanServerLocator.locateJBoss();
ObjectName onTM = new ObjectName("jboss:service=TransactionManager");
txTimeout = ((Integer)server.getAttribute(onTM, "TransactionTimeout")).intValue();

Looks related to the property changes integrated with JBossJTS 4.9.0.GA upgrade:
http://fisheye.jboss.org/changelog/JBossAS/?cs=97792