Ensure test suite works on Mac
Ensure test suite works on Mac

system suite contains no classes that work on Mac, but this shouldn't
cause ginkgo -r to fail.

[#99718098]

Signed-off-by: George Lestaris <5b078698b599a7ef978072fd4d352344963003fe@pivotal.io>

cloudfoundry-incubator/garden-linux,cloudfoundry-incubator/garden-linux,cloudfoundry-incubator/garden-linux