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/control.yml" "b/\173\173 cookiecutter._env_name \175\175/features/lvm_backend/control.yml"
new file mode 100644
index 0000000..accc8ae
--- /dev/null
+++ "b/\173\173 cookiecutter._env_name \175\175/features/lvm_backend/control.yml"
@@ -0,0 +1,3 @@
+# Provides LVM default_volume_type and backend settings on controller nodes
+classes:
+- system.cinder.control.backend.lvm