Commits on Aug 18, 2022

1. multiregionccl: improve and deflake TestMultiRegionDataDriven …

   This patch switches to printing the entire trace instead of an opaque
   failure if the trace analysis does not conform to the expected output.
   
   We also deflake this test. The framework allows for tests to express
   an expected leaseholder and wait for these changes to apply. Given the
   test cluster interface, the only claim that can be made here is that
   the outgoing leaseholder has applied the lease transfer. Other replicas
   may still be operating under a stale view of the lease. The
   "served via follower read" test output line is contingent on the serving
   replicas view of the lease. I think this was leading to some (but maybe
   not all) flakes we've seen sporadically. To get around this, we now wait
   for all replicas to have the same view of the leaseholder when waiting
   for zone config changes to apply.
   
   Release justification: non production code change
   Release note: None

   

   arulajmani committed Aug 18, 2022
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