[SPARK-16750] [ML] Fix GaussianMixture training failed due to feature column type mistake#14378

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yanboliang:spark-16750

Commits on Jul 27, 2016

Fix GaussianMixture training failed due to feature column type mistake
yanboliang
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Commits on Jul 28, 2016

Change to use transformSchema(dataset.schema, logging = true)
yanboliang
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