Cherry-pick #9767 to 6.5: Introduce next Changelog file#9807

Merged

urso merged 2 commits intoelastic:6.5from urso:backport_9767_6.5

Dec 28, 2018

+117-2

Commits on Dec 27, 2018

Introduce next Changelog file (elastic#9767 )
Steffen Siering
committed
Adapt changelog to 6.5 branch
urso
committed