UpdateUnitVersionsCommandTests add information on fail

Test randomly fails, but it is unclear why. Hopefully the additional
text will help to understand the reason.

eclipse-pde#666

ui/org.eclipse.pde.genericeditor.extension.tests/src/org/eclipse/pde/genericeditor/extension/tests/UpdateUnitVersionsCommandTests.java

@@ -88,8 +88,10 @@ private void confirmVersionUpdates(Map<String, String> expected) throws Exceptio
 		for (Entry<String, String> unit : expected.entrySet()) {
 			String expectedID = unit.getKey();
 			String expectedVersion = unit.getValue();
-			assertTrue("ID: " + expectedID + " not found in actual", actual.containsKey(expectedID));
-			assertEquals("ID: " + expectedID + " has the incorrect version.", expectedVersion, actual.get(expectedID));
+			assertTrue("ID: " + expectedID + " not found in actual. updatedText=" + updatedText,
+					actual.containsKey(expectedID));
+			assertEquals("ID: " + expectedID + " has the incorrect version. updatedText=" + updatedText,
+					expectedVersion, actual.get(expectedID));
 		}
 	}