Merge pull request #298 from andersjanmyr/support_for_watching_all_namespaces

Allow empty namespace to watch all namespaces.

Author: fanminshi

pkg/util/k8sutil/k8sutil.go

@@ -155,9 +155,6 @@ func GetWatchNamespace() (string, error) {
 	if !found {
 		return "", fmt.Errorf("%s must be set", WatchNamespaceEnvVar)
 	}
-	if len(ns) == 0 {
-		return "", fmt.Errorf("%s must not be empty", WatchNamespaceEnvVar)
-	}
 	return ns, nil
 }