client_failover-itest flakiness over recent revisions

bee410f8afe3d9e602ff3bc743596692fae784e1 (Failed 0 / 12)

c8baa0cf1141c792a8535f564b48a2b9c3393d7b (Failed 0 / 16)

7c8d8079be030d5f26bcceca5af39b57d6afb0bc (Failed 0 / 80)

748ef105309d0a5423660ea100f33ec56fb5cc45 (Failed 0 / 4)