kube: clean up PersistentVolumeClaims

There's no difference as far as jsonnet is concerned, but it may confuse newbies, as Service and SimpleIngress use double colon for its top-level kube helpers. This also removes any ambiguity as to whether this is manifested in final JSON. So we can make that a convention.

Change-Id: I01ad4ea63f4d5d8ee6e5d41c79637ba186548c6f
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1803
Reviewed-by: q3k <q3k@hackerspace.pl>
diff --git a/kube/postgres_v.libsonnet b/kube/postgres_v.libsonnet
index 1c4357a..ec7a7b8 100644
--- a/kube/postgres_v.libsonnet
+++ b/kube/postgres_v.libsonnet
@@ -47,8 +47,8 @@
 
     volumeClaim: kube.PersistentVolumeClaim(postgres.makeName("postgres")) {
         metadata+: postgres.metadata,
-        storage: cfg.storageSize,
-        storageClass: cfg.storageClassName,
+        storage:: cfg.storageSize,
+        storageClass:: cfg.storageClassName,
     },
     deployment: kube.Deployment(postgres.makeName("postgres")) {
         metadata+: postgres.metadata,