DERBY-5667; testReadCommitted(org.apache.derbyTesting.functionTests.tests.store.UpdateLocksTest)junit.framework.AssertionFailedError: Missing rows in ResultSet
   further improving error message in assert, and avoiding error message re table exists if a test case fails


git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1567787 13f79535-47bb-0310-9956-ffa450edef68