[SPARK-14623][ML]add label binarizer#12380

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hujy wants to merge 2 commits intoapache:masterfrom

Commits on Apr 14, 2016

[SPARK-14623][ML]add label binarizer
hujy
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Commits on Apr 15, 2016

change output format from vector to matrix and add 1 more test case
hujy
committed