[AAF] Use global storage templates for PVC

OOM has now templates in order to create the needed PVC, using:

* a PV with a specific class when using a common nfs mount path between
nodes (sames as today use) --> is the default behavior today
* or a storage class if we want to use dynamic PV.
  On this case, we use (in order of priority):
  - persistence.storageClassOverride if set on the chart
  - global.persistence.storageClass if set globally
  - persistence.storageClass if set on the chart

I've also modified statefulset deployment so they can use their own PVC
instead of writing into a specific directory inside

I've also set to 'emptyDir' volumes when persistence is not enabled
(except for aaf-config-pvc and aaf-status-pvc, which means that AAF will
still not work when persistence is disabled).

Change-Id: I05f133f058ebd9678df9ac0b7ef32bb43689e94f
Issue-ID: OOM-1227
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
diff --git a/kubernetes/aaf/charts/aaf-cass/templates/pvc.yaml b/kubernetes/aaf/charts/aaf-cass/templates/pvc.yaml
index 4f9dac0..39fd993 100644
--- a/kubernetes/aaf/charts/aaf-cass/templates/pvc.yaml
+++ b/kubernetes/aaf/charts/aaf-cass/templates/pvc.yaml
@@ -18,7 +18,7 @@
 kind: PersistentVolumeClaim
 apiVersion: v1
 metadata:
-  name: {{ include "common.fullname" .}}-pvc
+  name: {{ include "common.fullname" .}}-data
   namespace: {{ include "common.namespace" . }}
   labels:
     app: {{ include "common.name" . }}
@@ -30,19 +30,10 @@
 {{ toYaml .Values.persistence.annotations | indent 4 }}
 {{- end }}
 spec:
-  selector:
-    matchLabels:
-      app: {{ include "common.name" . }}
   accessModes:
     - {{ .Values.persistence.accessMode }}
   resources:
     requests:
       storage: {{ .Values.persistence.size }}
-{{- if .Values.persistence.storageClass }}
-{{- if (eq "-" .Values.persistence.storageClass) }}
-  storageClassName: ""
-{{- else }}
-  storageClassName: "{{ .Values.persistence.storageClass }}"
-{{- end }}
-{{- end }}
+  storageClassName: {{ include "common.storageClass" . }}
 {{- end -}}