Bind kube-apiserver to 0.0.0.0 and shift port to 6443

Single mode and unspecified metadata points to 443.
Updated all refs to kube-apiserver to point to correct vars.
Loadbalancer still operates on port 443.

Change-Id: Id67acd50e24cf65b3978679616c1f754a6685f68
diff --git a/metadata/service/master/cluster.yml b/metadata/service/master/cluster.yml
index f755401..fb17497 100644
--- a/metadata/service/master/cluster.yml
+++ b/metadata/service/master/cluster.yml
@@ -20,6 +20,7 @@
         allow_privileged: True
       apiserver:
         address: ${_param:cluster_local_address}
+        secure_port: 6443
         internal_address: ${_param:kubernetes_internal_api_address}
         insecure_address: 127.0.0.1
         insecure_port: 8080