kube: add .volume field on PVCs and ConfigMaps

Change-Id: I93eec44bd6df4ecb0044a4797faa9bf6fd26802d
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1811
Reviewed-by: q3k <q3k@hackerspace.pl>
diff --git a/kube/redis.libsonnet b/kube/redis.libsonnet
index 1464e7a..5d84f66 100644
--- a/kube/redis.libsonnet
+++ b/kube/redis.libsonnet
@@ -54,7 +54,7 @@
             template+: {
                 spec+: {
                     volumes_: {
-                        data: kube.PersistentVolumeClaimVolume(redis.volumeClaim),
+                        data: redis.volumeClaim.volume,
                     },
                     containers_: {
                         redis: kube.Container(redis.makeName("redis")) {