Handle missing values in painless (#30975)#31903

Merged

mayya-sharipova merged 1 commit intoelastic:6.xfrom mayya-sharipova:missing-values-in-script6.x

Jul 17, 2018

+311-19

Commits on Jul 10, 2018

Handle missing values in painless (elastic#30975 )
mayya-sharipova
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