[6.x] [kbn/pm] Implement --prefer-offline flag (#25840)#25898

Merged

spalger merged 1 commit intoelastic:6.xfrom spalger:backport/6.x/pr-25840

Nov 20, 2018

+14-6

Commits on Nov 19, 2018

[kbn/pm] Implement --prefer-offline flag (elastic#25840 )
Spencer
committed