Cherry-pick #9856 to 6.x: Add docker `event` metricset#9962

Merged

exekias merged 4 commits intoelastic:6.xfrom

exekias:backport_9856_6.x

Jan 22, 2019

Commits on Jan 18, 2019

Add docker `event` metricset (#9856)

exekias
authored and
Carlos Pérez-Aradros Herce
committed
Disable migration in docker event fields (#9947)

exekias
authored and
Carlos Pérez-Aradros Herce
committed
Move back docker event fields to it's namespace (#10073)

exekias
authored and
Carlos Pérez-Aradros Herce
committed

Commits on Jan 22, 2019

Merge branch '6.x' into backport_9856_6.x
exekias
authored