[7.x] [EPM] merge duplicate fields when creating index patterns (#60957)#61052

Merged

neptunian merged 1 commit intoelastic:7.xfrom neptunian:backport/7.x/pr-60957

Mar 24, 2020

+148-378

Commits on Mar 24, 2020

[EPM] merge duplicate fields when creating index patterns (elastic#60957 )
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