Allow default route to not be present
Allow default route to not be present

First, attempt to find an IP address from /proc/net/route. If we fail to do so, attempt to find a clear primary

Signed-off-by: Peter Hunt <fb7b1ad57b81f1e149129d77ecccc59c02fe0648@redhat.com>

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