DERBY-6356; java.security.AccessControlException in i18n.LocalizedDisplayScriptTest
  backport of the fix to make use of the TimeZoneTestSetup which has privileged code for TimeZone.setDefault()


git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.7@1540913 13f79535-47bb-0310-9956-ffa450edef68