Support cross-source dependencies

Additional tests and docs in later patches.

Change-Id: I3b86a1e3dd507fa5e584680fb6c86d35f9ff3e23
Story: 2001334
Task: 5885
diff --git a/tests/unit/test_connection.py b/tests/unit/test_connection.py
index 054ee5f..197b525 100644
--- a/tests/unit/test_connection.py
+++ b/tests/unit/test_connection.py
@@ -119,7 +119,7 @@
         self.assertEqual('SUCCESS', buildset0['result'])
         self.assertEqual('Build succeeded.', buildset0['message'])
         self.assertEqual('tenant-one', buildset0['tenant'])
-        self.assertEqual('https://hostname/%d' % buildset0['change'],
+        self.assertEqual('https://review.example.com/%d' % buildset0['change'],
                          buildset0['ref_url'])
 
         buildset0_builds = conn.execute(