[SPARK-18471][MLLIB] In LBFGS, avoid sending huge vectors of 0#15963

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AnthonyTruchet wants to merge 3 commits intoapache:masterfrom

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Commits on Nov 18, 2016

[SPARK-18471][MLLIB] In LBFGS, avoid sending huge vectors of 0

Eugene Kharitonov
authored and
Anthony Truchet
committed
Style fix according to reviewers' feedback
Anthony Truchet
committed

Commits on Nov 21, 2016

Merge pull request #11 from AnthonyTruchet/ENG-17719-lbfgs-only
AnthonyTruchet
authored