Cherry-pick #17978 to 7.x: Changing field type to keyword#18092

Merged

kaiyan-sheng merged 2 commits intoelastic:7.xfrom kaiyan-sheng:backport_17978_7.x

Apr 30, 2020

+8-7

Commits on Apr 29, 2020

Changing field type to keyword (#17978 )

SHolzhauer
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kaiyan-sheng
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update changelog
kaiyan-sheng
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