improved test failure message

Change-Id: Id22493c522c7b49e97e9638b003b782c010d7cf1

java/com.sap.sailing.domain.test/src/com/sap/sailing/domain/test/markpassing/MarkPassingCalculatorPerformanceTest.java

@@ -67,7 +67,7 @@ public class MarkPassingCalculatorPerformanceTest extends AbstractMockedRaceMark
         time = System.currentTimeMillis() - time;
         result.put("FinderPerformance", time);
         System.out.println(time);
-        Assert.assertTrue(time < 5000);
+        Assert.assertTrue("Time expected to be less than 5000ms but was "+time+"ms", time < 5000);
     }
 
     @Test