recover gracefully from crash when requesting a free port
recover gracefully from crash when requesting a free port

- happens randomly, shouldn't, and this is supposed to get around it

Signed-off-by: António Meireles <9056f7c1f560fe4e0c75ab3cde8bee0cf3d504f4@reformi.st>

AntonioMeireles/corectl,AntonioMeireles/coreos-xhyve,AntonioMeireles/coreos-xhyve,TheNewNormal/corectl,TheNewNormal/corectl,AntonioMeireles/corectl