[Merge] lp:~xnox/upstart/do-not-launch-session-dbus into lp:upstart

[Dimitri John Ledkov]

START_UPSTART(upstart_pid, TRUE) launches startup event and thus launches dbus user session job, if one is installed among other things that may be installed. Which kind of borks up notify-dbus-address tests, since dbus-address maybe notified by dbus user session job ahead of us, as seen in adt test failures.
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https://code.launchpad.net/~xnox/upstart/do-not-launch-session-dbus/+merge/218684
Your team Upstart Reviewers is requested to review the proposed merge of lp:~xnox/upstart/do-not-launch-session-dbus into lp:upstart.