[SPARK-24290][ML] add support for Array input for instrumentation.logNamedValue#21347

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lu-wang-dl wants to merge 2 commits intoapache:masterfrom

lu-wang-dl:SPARK-24290

Commits on May 16, 2018

add support for Array input for instrumentation.logNamedValue
lu-wang-dl
committed

Commits on Jun 4, 2018

change the way to log the array to a JSON string
lu-wang-dl
committed