message: fix flaky test failure
diff: @@ -385,7 +385,7 @@ namespace Azure { namespace Storage { namespace Test {
  Files::Shares::Models::ShareAccessTier::TransactionOptimized,
  properties.AccessTier.GetValue());
  EXPECT_FALSE(properties.AccessTierTransitionState.HasValue());
  - EXPECT_EQ(properties.LastModified, properties.AccessTierChangedOn.GetValue());
  + EXPECT_TRUE(IsValidTime(properties.AccessTierChangedOn.GetValue()));
  shareClients.emplace(std::move(shareName), std::move(shareClient));
  }
  {
  