[7.x] replace /elasticsearch/_msearch usages with custom endpoint (#76259)#76326

Merged

pgayvallet merged 1 commit intoelastic:7.xfrom pgayvallet:backport/7.x/pr-76259

Sep 1, 2020

+123-24

Commits on Aug 31, 2020

replace /elasticsearch/_msearch usages with custom endpoint (elastic#76259 )
pgayvallet
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