In order to more easily create more test cases, make the test case setup more declarative. https://bugzilla.gnome.org/show_bug.cgi?id=777732
This way we have both the test setup and testing in the same file. https://bugzilla.gnome.org/show_bug.cgi?id=777732
The added test checks that two monitors are lied out on a row next to each other. https://bugzilla.gnome.org/show_bug.cgi?id=777732