fix(router): Set default values in /deis/router

Global router settings should be set in /deis/router and not
/deis/router/$HOST
chore(controller): bump gunicorn to 19.1.1
Merge pull request #2004 from gabrtv/gunicorn-update

Update gunicorn to support dynamic configuration reload
Merge pull request #1938 from johanneswuerbach/fix-router-default-values

fix(router): Set default values in /deis/router