[CLIENT-4040] Fix flaky test case "test_neg_exists_with_low_timeout" in test_exists.py

[juliannguyen4]

This test case passes a low total_timeout to client.put() which still passes in most environments that have a low e2e latency. But if the e2e latency is high enough, this client.put() would fail and the test will be unable to get the record metadata using client.exists(). We increase the total_timeout so that client.put() still succeeds with a relatively low total timeout.

TODO

• Run macos x86 tests multiple times to check that test case no longer fails intermittently

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.37%. Comparing base (6739ae7) to head (cbb859c).
⚠️ Report is 3 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #917   +/-   ##
=======================================
  Coverage   83.37%   83.37%           
=======================================
  Files          99       99           
  Lines       14389    14389           
=======================================
  Hits        11997    11997           
  Misses       2392     2392           

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