Fix storage class type parameter (#134)

Author: michaellzc

charts/sourcegraph/templates/storageclass.yaml

@@ -12,7 +12,9 @@ metadata:
     {{- end }}
 provisioner: {{ .Values.storageClass.provisioner }}
 parameters:
-  type: {{ .Values.storageClass.type }}
+  {{- with .Values.storageClass.type }}
+  type: {{ . }}
+  {{- end }}
   {{- if .Values.storageClass.parameters}}
   {{- toYaml .Values.storageClass.parameters | nindent 2 }}
   {{- end }}

charts/sourcegraph/tests/storageClass_test.yaml

@@ -12,3 +12,11 @@ tests:
   - equal:
       path: parameters.zones
       value: us-central1-f
+- it: should not have 'type' when storageClass.type=null
+  set:
+    storageClass:
+      create: true
+      type: null
+  asserts:
+  - isNull:
+      path: parameters