test: Reflect exception change due to library upgrade

kedifa/test.py

@@ -426,7 +426,7 @@ class KedifaIntegrationTest(KedifaMixinCaucase, unittest.TestCase):
     with open(incorrect_key_pem, 'w') as out:
       out.write(key_pem + certificate_pem)
 
-    with self.assertRaises(requests.exceptions.SSLError):
+    with self.assertRaises(requests.exceptions.ConnectionError):
       self.requests_get(
         self.kedifa_url + self.reference, cert=incorrect_key_pem)