Migrate server config test to ginkgo
Migrate server config test to ginkgo

This commit achieves  to keep the tests structure consistent and raises
the test coverage.

Signed-off-by: Sascha Grunert <70ab469ddb2ac3e35f32ed7c2fd1cca514b2e879@suse.com>

mikebrow/cri-o,rhatdan/cri-o,rhatdan/cri-o,kubernetes-incubator/cri-o,mikebrow/cri-o,nalind/cri-o,nalind/cri-o,rhatdan/cri-o,kubernetes-incubator/cri-o,mikebrow/cri-o,kubernetes-incubator/cri-o,kubernetes-incubator/ocid,nalind/cri-o,kubernetes-incubator/ocid,kubernetes-incubator/cri-o,mikebrow/cri-o,rhatdan/cri-o,kubernetes-incubator/ocid