ML: update set_upgrade_mode, add logging (#38372)#38538

Merged

benwtrent merged 3 commits intoelastic:7.xfrom

benwtrent:backport/7.x-ml-set-upgrade-mode-add-logging-adj-test

Feb 8, 2019

Commits on Feb 6, 2019

ML: update set_upgrade_mode, add logging (#38372)
benwtrent
committed

Commits on Feb 7, 2019

Merge remote-tracking branch 'upstream/7.x' into backport/7.x-ml-set-upgrade-mode-add-logging-adj-test
benwtrent
committed

Commits on Feb 8, 2019

Merge remote-tracking branch 'upstream/7.x' into backport/7.x-ml-set-upgrade-mode-add-logging-adj-test
benwtrent
committed