Give Docker more time to kill containers before upstart kills Docker.
The default kill timeout is 5 seconds.
This will help decrease the chance of but not eliminate the chance of
orphaned container processes.
Signed-off-by: David Xia <dxia@spotify.com>
Upstream-commit: 2f9e7a067a7273a0f344c1c9a6397e4bb61d7554
Component: engine
f3325976cc