[BACKPORT] Add pre-upgrade check to test cluster routing allocation is enabled#39817

Merged

bizybot merged 1 commit intoelastic:6.7from bizybot:fix-internal-index-reindexer-67

Mar 12, 2019

+168-57

Commits on Mar 8, 2019

Add pre-upgrade check to test cluster routing allocation is enabled (elastic#39340 )

bizybot
authored and
Yogesh Gaikwad
committed