Let checkQuickVerificationWith2Clients use a longer timeaut and raise an...

Let checkQuickVerificationWith2Clients use a longer timeaut and raise an assertion error if the timeout fails. Trying to debug intermittant failures on Travis, seen in all versions of Python.

src/ZEO/tests/ConnectionTests.py

@@ -619,8 +619,9 @@ class InvqTests(CommonSetupTearDown):
         perstorage = self.openClientStorage(cache="test")
 
         forker.wait_until(
-            (lambda : perstorage.verify_result == "quick verification"),
-            onfail=(lambda : None))
+            func=(lambda : perstorage.verify_result == "quick verification"),
+            timeout=60,
+            label="perstorage.verify_result to be quick verification")
 
         self.assertEqual(perstorage.verify_result, "quick verification")
         self.assertEqual(perstorage._server._last_invals,