KVM-test: subtest guest_s4: Add check of if there's enough space left for S4

If disk has no enough space left, check S4 support will fail.

Also use 'TestNAError' as error type if guest really doesn't support S4.
(Thanks Jason for pointing this out. :)

Signed-off-by: Yolkfull Chow <yzhou@redhat.com>


git-svn-id: http://test.kernel.org/svn/autotest/trunk@4134 592f7852-d20e-0410-864c-8624ca9c26a4
1 file changed