[VOL-1615] Create VOLTHA 2.0 Helm Charts

Squashed version of David Bainbridge's patches at commit:

 https://github.com/ciena/voltha-helm-charts/commit/120fb4b719e0492e6a0a24cc78d08b806e3698fa

Linted the README, fixed whitespace and incubator repo address

Change-Id: I7c5b1c3478450bbefbed09a75e9029e6371cae3a
diff --git a/voltha-etcd-cluster/values.yaml b/voltha-etcd-cluster/values.yaml
new file mode 100644
index 0000000..aece130
--- /dev/null
+++ b/voltha-etcd-cluster/values.yaml
@@ -0,0 +1,36 @@
+# Copyright 2017-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.
+
+# Default values for etcd-cluster.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+registry: ""
+clusterName: "voltha-etcd-cluster"
+clusterSize: 3
+memoryLimit: 1024Mi
+autoCompactionRetention: "12"
+
+# expose the etcd-cluster as a nodePort
+# etcdNodePort: 32379
+etcdNodePort: ""
+
+images:
+  etcd:
+    repository: "quay.io/coreos/etcd"
+    tag: "v3.2.18"
+  busybox:
+    repository: "busybox"
+    tag: "1.28.1-glibc"
+