Added Percona MongoDB helm chart with backup support (#230)

* added helm chart for psmdb operator and db

* tested backup and restore

* updated doc

* added end of line in all files

* updated values file

* added templates for backup and restore files

* worked on feedbacks

charts/psmdb-operator-db/Chart.yaml

@@ -0,0 +1,21 @@
+apiVersion: v2
+name: psmdb-operator-db
+description: A Helm chart for Percona Operator and Percona Server for MongoDB
+type: application
+version: 1.0.0
+appVersion: 1.0.0
+dependencies:
+  - name: psmdb-operator
+    version: 1.18.0
+    repository: https://percona.github.io/percona-helm-charts/
+    alias: psmdb-operator
+    tags:
+      - psmdb-operator
+    condition: psmdb-operator.enabled
+  - name: psmdb-db
+    version: 1.18.0
+    repository: https://percona.github.io/percona-helm-charts/
+    alias: psmdb-db
+    tags:
+      - psmdb-db
+    condition: psmdb-db.enabled

charts/psmdb-operator-db/DOC.md

@@ -0,0 +1,2 @@
+Backup and Restore have been tested using backup.yaml and restore.yaml files respectively using Azure Blob Storage.
+For using cloud storage as backup, a Kubernetes secret need to be made: https://docs.percona.com/percona-operator-for-mongodb/backup-tutorial.html#configure-backup-storage