Code review comment for lp:~canonical-platform-qa/ubuntu-system-tests/systemd_support

I saw this failure relating to introspecting maliit server on the first test run after boot for both krillin and arale: http://pastebin.ubuntu.com/23489848/

After the first test run it was ok for both devices, but if the device was rebooted it happened again. I confirmed that this problem doesn't happen on trunk.

Other minor comments below.