Update metadata for Ansible galaxy support

Change-Id: I43245ec740d17b43ca60cf8ab158b020a9df2fa4
diff --git a/meta/main.yml b/meta/main.yml
index 5807e9b..0b44b1a 100644
--- a/meta/main.yml
+++ b/meta/main.yml
@@ -5,6 +5,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 galaxy_info:
+  role_name: nginx
   author: Open Networking Foundation
   description: NGINX Web Server
   company: Open Networking Foundation