Flaky test TestSimulator::test_one_gaussian

[LukeLB]

Flaky test was being caused by sampling error thus threshold has been changed from 0.1 to 0.15 to reduce the probability of failure. Fixes #5409.

Depending on what your PR does, here are a few things you might want to address in the description:

• what are the (breaking) changes that this PR makes?
• important background, or details about the implementation
• are the changes—especially new features—covered by tests and docstrings?
• linting/style checks have been run
• consider adding/updating relevant example notebooks
• right before it's ready to merge, mention the PR in the RELEASE-NOTES.md

[codecov]

Codecov Report

Merging #5467 (d367385) into main (d018cba) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #5467      +/-   ##
==========================================
+ Coverage   81.39%   81.41%   +0.02%     
==========================================
  Files          82       82              
  Lines       14218    14218              
==========================================
+ Hits        11573    11576       +3     
+ Misses       2645     2642       -3     

Impacted Files	Coverage Δ
pymc/parallel_sampling.py	87.70% <0.00%> (+0.99%)	⬆️

[ricardoV94]

Should this assert below also be adjusted or is the distribution more narrow there?

https://github.com/pymc-devs/pymc/blob/a04e49007e0c87f8f70542efdb02cd0bdf5db12f/pymc/tests/test_smc.py#L321

[LukeLB]

Should this assert below also be adjusted or is the distribution more narrow there?

https://github.com/pymc-devs/pymc/blob/a04e49007e0c87f8f70542efdb02cd0bdf5db12f/pymc/tests/test_smc.py#L321

Just ran this and from 5000 samples 0% pass the 0.1 threshold so I think we're safe here. Graph below.

[ricardoV94]

Thanks so much for this work!