cluster/kube/metallb: downgrade to 0.7.3
diff --git a/cluster/kube/lib/metallb.libsonnet b/cluster/kube/lib/metallb.libsonnet
index 5ebb731..a56fc90 100644
--- a/cluster/kube/lib/metallb.libsonnet
+++ b/cluster/kube/lib/metallb.libsonnet
@@ -24,7 +24,7 @@
         cfg:: {
             namespace: "metallb-system",
             namespaceCreate: true,
-            version:: "master",
+            version:: "v0.7.3",
             imageController: "metallb/controller:" + cfg.version,
             imageSpeaker: "metallb/speaker:" + cfg.version,
             addressPools: error "addressPools must be set in config",