Import patches-unapplied version 2.472 to ubuntu/artful-proposed

Imported using git-ubuntu import.

Changelog parent: 84ef6ff8e3

New changelog entries:
  [ Michael Hudson-Doyle ]
  * Add snap.subiquity.started.service to subiquity.service's Requires=.

debian/changelog

@@ -1,3 +1,10 @@
+livecd-rootfs (2.472) artful; urgency=medium
+
+  [ Michael Hudson-Doyle ]
+  * Add snap.subiquity.started.service to subiquity.service's Requires=.
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Tue, 10 Oct 2017 18:41:01 -0400
+
 livecd-rootfs (2.471) artful; urgency=medium
 
   * Now that grub-related diversions have been factored out in 2.466

live-build/ubuntu-server/includes.binary/overlay/lib/systemd/system/subiquity.service

@@ -2,7 +2,7 @@
 Description=Subiquity, the installer for Ubuntu Server
 After=systemd-user-sessions.service plymouth-quit-wait.service
 After=rc-local.service snap.subiquity.started.service
-Requires=snapd.service
+Requires=snapd.service snap.subiquity.started.service
 IgnoreOnIsolate=yes
 ConditionPathExists=/dev/tty0
 ConditionPathExists=!/run/subiquity/complete