Fail to start when already listening on socket
Fail to start when already listening on socket

If CRI-O is already listening on a socket, then we should fail to start
the server, which was not the case before this patch.

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

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