update notifier is no longer using a delayed autostart

[Tim Lunn]

Prior to upstart user sessions update-notifier was set to autostart with a 60sec delay.

X-GNOME-Autostart-Delay=60

This value is however no longer honoured and instead update-notifier starts immediately. In the case of pending crash reports the UI pops up in the top left of screen well before the window manager has loaded. Which really does seem visually strange.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: update-notifier 0.144
ProcVersionSignature: Ubuntu 3.11.0-5.11-generic 3.11.0
Uname: Linux 3.11.0-5-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.1-0ubuntu3
Architecture: amd64
Date: Wed Sep 11 15:25:36 2013
InstallationDate: Installed on 2012-09-23 (353 days ago)
InstallationMedia: Ubuntu GNOME Remix 12.10 "Quantal Quetzal" - Alpha amd64(20120922)
MarkForUpload: True
SourcePackage: update-notifier
UpgradeStatus: No upgrade log present (probably fresh install)