DERBY-6380; Rolling log files do not get copied in failed directory when a junit test fails
   adjusting ErrorStreamTest to copy files created in it on fail, and BaseTestCase to copy defaults on fail.


git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1545935 13f79535-47bb-0310-9956-ffa450edef68