[SPARK-19256][SQL] Remove ordering enforcement from `FileFormatWriter` and let planner do that#20206

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tejasapatil wants to merge 3 commits intoapache:masterfrom tejasapatil:refac_sort_req

+93-54

Commits on Jan 9, 2018

[SPARK-19256][SQL] Move bucketing constraints out of FileFormatWriter into RunnableCommand
tejasapatil
committed

Commits on Jan 10, 2018

override requiredOrdering for InsertIntoHiveTable
tejasapatil
committed
requiredOrdering for InsertIntoHiveTable to only consider static partitions
tejasapatil
committed