Add standardized helm chart for appc

This is a standardization (based on helm community best practices)
of a Helm chart for the Application Controller (appc) in ONAP.

How to deploy the helm chart (outside of the parent onap chart) from
the local oom/kubernetes codebase.

Run local helm repository in the background:
$ nohup helm serve &

In kubernetes directory run:
$ make all

2 ways to install (--set are for testing purposes)
Full onap:
$ helm install onap --name onap --namespace onap --set global.pullPolicy=Never,mysql.replicaCount=2,appc.replicaCount=2

Appc only:
$ helm install setup --name onap-setup --namespace onap-apps
$ helm install appc --name appc --namespace onap-apps

Change-Id: Ib780f979ad25ecafb08110504b5941e980ca8a95
Issue-ID: OOM-733
Signed-off-by: Mike Elliott <mike.elliott@amdocs.com>
Signed-off-by: ah415j <ah415j@att.com>
diff --git a/kubernetes/mysql/templates/pv.yaml b/kubernetes/mysql/templates/pv.yaml
new file mode 100644
index 0000000..ba128b9
--- /dev/null
+++ b/kubernetes/mysql/templates/pv.yaml
@@ -0,0 +1,22 @@
+{{- if and .Values.persistence.enabled (not .Values.persistence.existingClaim) -}}
+kind: PersistentVolume
+apiVersion: v1
+metadata:
+  name: {{ include "common.fullname" . }}-data
+  namespace: {{ include "common.namespace" . }}
+  labels:
+    app: {{ include "common.name" . }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+    name: {{ include "common.fullname" . }}
+spec:
+  capacity:
+    storage: {{ .Values.persistence.size}}
+  accessModes:
+    - {{ .Values.persistence.accessMode }}
+  storageClassName: "{{ include "common.fullname" . }}-data"
+  persistentVolumeReclaimPolicy: {{ .Values.persistence.volumeReclaimPolicy }}
+  hostPath:
+    path: {{ .Values.global.persistence.mountPath | default .Values.persistence.mountPath }}/{{ .Release.Namespace }}/{{ .Values.persistence.mountSubPath }}
+{{- end -}}