DERBY-5865; On IBM 1.7 TestDurabilityProperty fails with FAIL -- derby.system.durability=test mode seems to be broken.
   merge of revision 1551311 from trunk; commenting out the performance check.


git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.10@1551629 13f79535-47bb-0310-9956-ffa450edef68