Simplify the usage of the WAS ExtendedJTATransaction API. We only need to check the globalId (and not the localId) for presence of a global (user) transaction. Also corrected some of the exception processing and tracing of exceptions for rollback processing.
incubator/openjpa/trunk/openjpa-kernel/src/main/java/org/apache/openjpa/ee/WASManagedRuntime.java