Added voltha-infra chart
Added voltha-stack chart
Moved "defaults" values to "global" so that they can be managed by the
macro charts
Added examples for different workflows

Change-Id: I5fb2bfa54a1be725892445e93bd8a35d608e5d14
diff --git a/voltha-stack/Chart.yaml b/voltha-stack/Chart.yaml
new file mode 100644
index 0000000..0d3d4ee
--- /dev/null
+++ b/voltha-stack/Chart.yaml
@@ -0,0 +1,48 @@
+# Copyright 2020-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.
+---
+apiVersion: v2
+description: A Helm chart to install a VOLTHA stack on existing infrastructure
+keywords:
+  - "onf"
+  - "voltha"
+  - "openolt-adapters"
+  - "openonu-adapters"
+home: "https://www.opennetworking.org/voltha"
+icon: "https://guide.opencord.org/logos/voltha.svg"
+maintainers:
+  - name: "Open Networking Foundation"
+    email: "info@opennetworking.org"
+    url: "https://www.opennetworking.org"
+name: voltha-stack
+
+appVersion: "1.0"
+version: 0.1.0
+
+dependencies:
+  - name: voltha
+    # repository: https://charts.opencord.org
+    version: 2.8.1
+    repository: "file://../voltha"
+    condition: voltha.enabled
+  - name: voltha-adapter-openonu
+    # repository: https://charts.opencord.org
+    version: 2.7.1
+    repository: "file://../voltha-adapter-openonu"
+    condition: voltha-adapter-openonu.enabled
+  - name: voltha-adapter-openolt
+    # repository: https://charts.opencord.org
+    version: 2.8.1
+    repository: "file://../voltha-adapter-openolt"
+    condition: voltha-adapter-openolt.enabled