DERBY-6250; nightly regression test failure: jdbc4.LoginTimeoutTest testBasic client/server java.sql.SQLTimeoutException: XBDA0, Login timeout Exceeded and junit.framework.AssertionFailedError: Should not have been able to connect!
   backport of revision 1575065 from trunk; add more details to the error message on failure.


git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.10@1576900 13f79535-47bb-0310-9956-ffa450edef68