Add set of cinder LVM roles for model customizations

Change-Id: Iba02baa9005edee3f616d008f1752df5caa9e168
diff --git "a/\173\173 cookiecutter._env_name \175\175/features/lvm_backend/init.yml" "b/\173\173 cookiecutter._env_name \175\175/features/lvm_backend/init.yml"
index 9d4208c..6b622fc 100644
--- "a/\173\173 cookiecutter._env_name \175\175/features/lvm_backend/init.yml"
+++ "b/\173\173 cookiecutter._env_name \175\175/features/lvm_backend/init.yml"
@@ -1,12 +1,4 @@
-#parameters:
-#  linux:
-#    storage:
-#      lvm:
-#        cinder-volumes:
-#          enabled: true
-#          devices:
-#            - /dev/vdb
-
+# Deprecated class, will be empty soon
 classes:
 - system.cinder.volume.single
 - system.cinder.volume.notification.messagingv2