Add a test case that if the first primary fails, the fallback of a
second primary on plain DNS works. This is mainly to test that the port
configuration inheritance works correctly.
(cherry picked from commit 622a499027)
Add a test case that if the first primary fails, the fallback of a
second primary on plain DNS works. This is mainly to test that the port
configuration inheritance works correctly.
(cherry picked from commit 622a499027)