Merge component 'packaging' from git@github.com:docker/docker-ce-packaging 18.09

components/packaging/systemd/docker.service

@@ -2,7 +2,7 @@
 Description=Docker Application Container Engine
 Documentation=https://docs.docker.com
 BindsTo=containerd.service
-After=network-online.target firewalld.service
+After=network-online.target firewalld.service containerd.service
 Wants=network-online.target
 Requires=docker.socket
 
@@ -11,7 +11,7 @@ Type=notify
 # the default is not to use systemd for cgroups because the delegate issues still
 # exists and systemd currently does not support the cgroup feature set required
 # for containers run by docker
-ExecStart=/usr/bin/dockerd -H fd://
+ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
 ExecReload=/bin/kill -s HUP $MAINPID
 TimeoutSec=0
 RestartSec=2