[SPARK-15094][SQL] Avoid extra Project when DeserializeToObject at top of logical plan#12898

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viirya wants to merge 7 commits intoapache:masterfrom

viirya:fix-ds-generic

Commits on May 5, 2016

Fix it.
viirya
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Fix test.
viirya
committed

Commits on May 6, 2016

Merge remote-tracking branch 'upstream/master' into fix-ds-generic
viirya
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