[automerger skipped] Fix flaky test for DnsResolverTest am: 402077cc3a -s ours

am skip reason: Change-Id Iaed6285677f74a5ee6cc6684534ddc0758b25974 with SHA-1 fb735de0e8 is in history

Change-Id: Ic845fd65a2f16c233985ea97adbd1fddf577788d
tree: 3b1be76fa7f6458077962c53f0070740c1f55e9e
  1. tests/