TxStats.enable generates excessive GC overhead

TxStats.enable() calls arjPropertyManager.getCoordinatorEnvironmentBean() with each invocation which results in String concatenation to generate a HashMap key. The String concatenation generated 1.61GB of GC overhead during a 20 minute performance test. Changing TxStats to use a private static reference to the Bean decreases the GC overhead to 20KB for the same 20 minute test