DERBY-5553 System property for client tracing -Dderby.client.traceDirectory does not work with XADataSource 

merge revision  1518766 from trunk.



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.10@1519123 13f79535-47bb-0310-9956-ffa450edef68