[Backport][ML-DataFrame] set minimum supported version (#39043)#39051

Merged

hendrikmuhs merged 1 commit intoelastic:7.xfrom hendrikmuhs:data-frame-version-7.x

Feb 18, 2019

+1-2

Commits on Feb 18, 2019

set minimum supported version (elastic#39043 )
Hendrik Muhs
committed