Add standardized helm chart for so

This is a standardization (based on helm community best practices)
of a Helm chart for the Service Orchestrator (so) in ONAP.

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

** need to create/update dependencies defined in the chart's
** requirements.yaml
helm dep update so/

** deploy the so helm chart with the "release" name of 'onap'
helm install so/ -n onap

Change-Id: I22471eb9fe0dec32941e14dc63857222c80ebe20
Issue-ID: OOM-727
Signed-off-by: Mike Elliott <mike.elliott@amdocs.com>
diff --git a/kubernetes/so/charts/mariadb/templates/pvc.yaml b/kubernetes/so/charts/mariadb/templates/pvc.yaml
new file mode 100644
index 0000000..4a15577
--- /dev/null
+++ b/kubernetes/so/charts/mariadb/templates/pvc.yaml
@@ -0,0 +1,29 @@
+{{- if and .Values.persistence.enabled (not .Values.persistence.existingClaim) -}}
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: {{ include "common.fullname" . }}
+  namespace: {{ include "common.namespace" . }}
+  labels:
+    app: {{ include "common.fullname" . }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+{{- if .Values.persistence.annotations }}
+  annotations:
+{{ toYaml .Values.persistence.annotations | indent 4 }}
+{{- end }}
+spec:
+  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 }}
+{{- end -}}