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/devtools/kube/sourcegraph.libsonnet b/devtools/kube/sourcegraph.libsonnet
index 6cce497..651bfc4 100644
--- a/devtools/kube/sourcegraph.libsonnet
+++ b/devtools/kube/sourcegraph.libsonnet
@@ -86,13 +86,13 @@
         pvc: {
             data: kube.PersistentVolumeClaim(sourcegraph.makeName("data")) {
                 metadata+: sourcegraph.metadata,
-                storage: "40Gi",
-                storageClass: cfg.storageClassName,
+                storage:: "40Gi",
+                storageClass:: cfg.storageClassName,
             },
             etc: kube.PersistentVolumeClaim(sourcegraph.makeName("etc")) {
                 metadata+: sourcegraph.metadata,
-                storage: "4Gi",
-                storageClass: cfg.storageClassName,
+                storage:: "4Gi",
+                storageClass:: cfg.storageClassName,
             },
         },
     }