make utils tests less verbose

Given the big number of tests, printing a dot for each test (instead of
multiple lines) is enough ;-)

utils/test/test-capability.py

@@ -989,4 +989,4 @@ class CapabilityDeleteTest(AATest):
 
 setup_all_loops(__name__)
 if __name__ == '__main__':
-    unittest.main(verbosity=2)
+    unittest.main(verbosity=1)