fix(ksonnet-util): ensure empty name is covered (#322)

Author: Duologic

ksonnet-util/kausal.libsonnet

@@ -64,13 +64,13 @@ k {
 
       persistentVolumeClaim+:: {
         new(name='')::
-          if 'new' in super
-          then super.new(name)
-          else
-            if name != '' then
-              {} + super.mixin.metadata.withName(name)
+          if name != '' then
+            if 'new' in super
+            then super.new(name)
             else
-              {},
+              {} + super.mixin.metadata.withName(name)
+          else
+            {},
       },
 
       container:: $.apps.v1.deployment.mixin.spec.template.spec.containersType {