Add name and description fields to plan-environment.yaml

Change-Id: I99b96343742ee5c40d8786e26b2336427e225c82
Implements: blueprint update-plan-environment-yaml

plan-environment.yaml

@@ -1,5 +1,8 @@
-version: 1.0
-
-template: overcloud.yaml
-environments:
--  path: overcloud-resource-registry-puppet.yaml
+version: 1.0
+
+name: overcloud
+description: >
+  Default Deployment plan
+template: overcloud.yaml
+environments:
+  - path: overcloud-resource-registry-puppet.yaml

releasenotes/notes/update-plan-environment-4e164b57a801e2cb.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - Add name and description fields to plan-environment.yaml