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Commit 7e8e62ae authored by Joseph K. Bradley's avatar Joseph K. Bradley Committed by Xiangrui Meng
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[SPARK-5015] [mllib] Random seed for GMM + make test suite deterministic

Issues:
* From JIRA: GaussianMixtureEM uses randomness but does not take a random seed. It should take one as a parameter.
* This also makes the test suite flaky since initialization can fail due to stochasticity.

Fix:
* Add random seed
* Use it in test suite

CC: mengxr  tgaloppo

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #3981 from jkbradley/gmm-seed and squashes the following commits:

f0df4fd [Joseph K. Bradley] Added seed parameter to GMM.  Updated test suite to use seed to prevent flakiness
parent 454fe129
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