Command for running CI testing in the autostart file should be grouped together

For the recently merged branch [1], the command for checking systemd should be grouped together in the one-liner && || statment
e.g.
if you run the following command on Vivid:
$ pidof systemd && echo "A"; echo "B"; echo "C" || echo "D"; echo "E"; echo "F"
It will return
867
A
B
C
E
F

$ pidof no_such_pid && echo "A"; echo "B"; echo "C" || echo "D"; echo "E"; echo "F"
It will return
B
C
E
F

To fix this, it should be grouped like this:
$ pidof systemd && { echo A; echo B; } || { echo "C"; echo "D" ;}

The command sequence:
systemd-ci-notifier
checkbox sru
systemd-ci-mailer
upstart-ci-notifier
checkbox sru
upstart-ci-mailer

From the command sequence and the testing command above we can see it will try to run checkbox sru for systmed first,
therefore the only impact for this is that checkbox sru might be triggered twice, I will mark the importance for this as medium.

[1] https://code.launchpad.net/~cypressyew/checkbox/ci-systemd-compability/+merge/257851