Add service account, roles and bindings

templates/mongodb-clusterRole.yml

+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ template "mongodb.name" . }}
+rules:
+  - verbs:
+      - '*'
+    apiGroups:
+      - '*'
+    resources:
+      - '*'
\ No newline at end of file

templates/mongodb-clusterRoleBinding.yaml

+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ template "mongodb.name" . }}
+subjects:
+  - kind: ServiceAccount
+    name: {{ template "mongodb.name" . }}
+    namespace: {{ .Release.Namespace }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ template "mongodb.name" . }}

templates/mongodb-serviceAccount.yaml

+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ template "mongodb.name" . }}
+  namespace: {{ .Release.Namespace }}
+automountServiceAccountToken: true
\ No newline at end of file