Add the ability to install sudoers file

Change-Id: Ie4edfa60ca0defd9074f84f7ce6bf71b93d95959
diff --git a/defaults/main.yml b/defaults/main.yml
index a330267..a79f112 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -4,5 +4,6 @@
 # SPDX-FileCopyrightText: © 2020 Open Networking Foundation <support@opennetworking.org>
 # SPDX-License-Identifier: Apache-2.0
 
-example_default1: example_value1
-example_default2: example_value2
+userlist: []
+
+users_sudoers: []