DERBY-6760; test_01_planCost has been failing for last couple nights on trunk and 10.11 with Unexpected SQL state. expected:<XIE0S> but was:<null>
  making the test accept a 38000 sqlstate with ibm 1.6 jvm.


git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1630598 13f79535-47bb-0310-9956-ffa450edef68