ServerPropertiesTest prints .java.net.SocketException: Connection reset to console but test passes 

Remove e.printStackTrace() of error if log writer is null, unless derby.drda.debug is true



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1526172 13f79535-47bb-0310-9956-ffa450edef68