Make install-namespace avoid kube-system

scripts/install-namespace.sh

@@ -68,7 +68,7 @@ configure_namespace () {
 }
 
 if [ "x$namespace" = "xall" ]; then
-    for i in $(kubectl get ns | sed '1d; s/\([^ ]\+\).*/\1/'); do
+    for i in $(kubectl get ns | sed '1d;/^kube-system/d;s/\([^ ]\+\).*/\1/'); do
         configure_namespace $i
     done
 else