ARROW-6113: [Java] Support vector deduplicate function#4993

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liyafan82 wants to merge 3 commits intoapache:masterfrom

liyafan82:fly_0722_dedup

Commits on Aug 20, 2019

[ARROW-6113][Java] Support vector deduplicate function
liyafan82
committed

Commits on Aug 21, 2019

Update VectorRunDeduplicator.java
emkornfield
authored

Commits on Aug 23, 2019

[ARROW-6113][Java] Add comment for parameters
liyafan82
committed