[6.x] [APM] Add `apm_core` plugin and query errors, spans, transactions from separate indices (#21022)#21108

Merged

sorenlouv merged 1 commit intoelastic:6.xfrom sorenlouv:backport/6.x/pr-21022

Jul 24, 2018

+77-30

Commits on Jul 23, 2018

[APM] Add apm_core plugin and query errors, spans, transactions from separate indices (elastic#21022 )
sorenlouv
committed