cluster/kube: Centralize namespace admin RoleBindings

Change-Id: Iec3505b2f4a1647e67cf47cf189c77534b5be6ac
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1696
Reviewed-by: q3k <q3k@hackerspace.pl>
diff --git a/cluster/kube/k0-admins.jsonnet b/cluster/kube/k0-admins.jsonnet
new file mode 100644
index 0000000..96e44ad
--- /dev/null
+++ b/cluster/kube/k0-admins.jsonnet
@@ -0,0 +1,7 @@
+// Only the admins (per-namespace RoleBindings)
+
+local k0 = (import "k0.libsonnet").k0;
+
+{
+    admins: k0.admins,
+}