ISPN-3982 TransactionTable leaks memory when JTS is activated

* Some implementation has an unstable hash code. Use instead the identityHashCode()
Replace sfl4j-jdk14 dependency with sfl4j-log4j12 so that jboss logging
writes to log4j in the cdi module (and dependents).

Add more debugging around cache listeners. It seems Class.getMethods()
sometimes returns synthetic methods created by overriding a generic method.