Fix flaky DistributionTest
#3769
Merged
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I noticed on a bunch of CI jobs that various individual tests for the
GaussianDistributionandGammaDistributionclasses fail. I ran them locally, and I think this is a result of spurious failures; I didn't see anything wrong in the implementation.After tuning tolerances and increasing dataset sizes (so that distributions are easier to estimate), I saw no failures in 5000 runs of the
[DistributionTest]test suite.