Only include ports in one container in Kube YAML

This likely broke when we made containers able to detect that
they shared a network namespace and grab ports from the
dependency container - prior to that, we could grab ports without
concern for conflict, only the infra container had them. Now, all
containers in a pod will return the same ports, so we have to
work around this.

Fixes #3408

Signed-off-by: Matthew Heon <matthew.heon@pm.me>

libpod/kube.go

@@ -138,6 +138,11 @@ func (p *Pod) podWithContainers(containers []*Container, ports []v1.ContainerPor
 			if err != nil {
 				return nil, err
 			}
+
+			// Since port bindings for the pod are handled by the
+			// infra container, wipe them here.
+			result.Ports = nil
+
 			// We add the original port declarations from the libpod infra container
 			// to the first kubernetes container description because otherwise we loose
 			// the original container/port bindings.