play kube: never add empty alias

Netavark v1.15 added new warnings on some invalid names and that
triggerd a new test failure in podman e2e test.

The "Podman kube play with disabled cgroup" case now complains about an
empty name:
podman [options] kube play /tmp/CI_aM20/podman-e2e-3156601197/subtest-3441376193/p/kube.yaml
[WARN  netavark::network::bridge] invalid network alias "": name is empty, ignoring this name

This is because this test does not set a container name thus the code
was adding an empty string so to fix it check if the name is not empty
first.

Signed-off-by: Paul Holzinger <[email protected]>

Author: Luap99

pkg/domain/infra/abi/play.go

@@ -890,7 +890,9 @@ func (ic *ContainerEngine) playKubePod(ctx context.Context, podName string, podY
 	// the podName appended to it, but this is a breaking change and will be done in podman 5.0
 	ctrNameAliases := make([]string, 0, len(podYAML.Spec.Containers))
 	for _, container := range podYAML.Spec.Containers {
-		ctrNameAliases = append(ctrNameAliases, container.Name)
+		if container.Name != "" {
+			ctrNameAliases = append(ctrNameAliases, container.Name)
+		}
 	}
 	for k, v := range podSpec.PodSpecGen.Networks {
 		v.Aliases = append(v.Aliases, ctrNameAliases...)