IdleRemover using "random" classloader as TCL

The class org.jboss.resource.connectionmanager.IdleRemover
starts a new thread to do period idle connection checking.

The thread is initiated by the first pool allocation.
If this is done from a J2EE application, the thread will use the application's classloader as the thread context classloader.

Which means the classloader cannot be garbage collected after a redeploy.