New testcase for installation without selinux

[Petr Schindler]

I propose new test case [1]. This test case is related to final criterion:

"The installed system must run normally if the user chooses to install without SELinux"

There is no test case for this now.

I have one note on this. There is used noselinux option, but it doesn't work now. I filled bug [2] there is another option with the same effect - selinux=0 and this one works fine, but Anaconda have noselinux in documentation, so it should work and they're working on it.

[1] https://fedoraproject.org/wiki/User:Pschindl/Draft_QA_Testcase_Install_without_selinux
[2] https://bugzilla.redhat.com/show_bug.cgi?id=784828