chore: fix flakiness in python tests

[mhamilton723]

No description provided.

[mhamilton723]

/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

[codecov]

Codecov Report

Merging #1144 (297b833) into master (2047992) will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1144      +/-   ##
==========================================
- Coverage   85.38%   85.29%   -0.09%     
==========================================
  Files         257      257              
  Lines       12061    12061              
  Branches      632      632              
==========================================
- Hits        10298    10288      -10     
- Misses       1763     1773      +10     

Impacted Files	Coverage Δ
...ala/org/apache/spark/ml/param/DataFrameParam.scala	66.66% <0.00%> (-20.84%)	⬇️
...com/microsoft/ml/spark/core/utils/AsyncUtils.scala	65.00% <0.00%> (-5.00%)	⬇️
...a/com/microsoft/ml/spark/io/http/HTTPClients.scala	56.66% <0.00%> (-3.34%)	⬇️
...microsoft/ml/spark/cognitive/SpeechToTextSDK.scala	87.07% <0.00%> (-0.77%)	⬇️

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