Revert "renaming helm-chart of "volt" service to "olt-service""

This reverts commit 17e312b16f9964261a6f882b4d452be1a25ec427.

Change-Id: I5df4523ad446a61a1bee70579de3659af8e0932d
diff --git a/xos-services/volt/Chart.yaml b/xos-services/volt/Chart.yaml
new file mode 100644
index 0000000..83d783c
--- /dev/null
+++ b/xos-services/volt/Chart.yaml
@@ -0,0 +1,21 @@
+---
+# Copyright 2018-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: volt
+description: A Helm chart for XOS's "olt-service" service
+icon: https://guide.opencord.org/logos/cord.svg
+
+version: 2.2.2
+appVersion: 2.2.1