Add roles for designate bind9 backend

Change-Id: I7dab1f960b8659b331174ee8bd916949f8f74e7f
diff --git "a/\173\173 cookiecutter._env_name \175\175/features/designate_bind9/database.yml" "b/\173\173 cookiecutter._env_name \175\175/features/designate_bind9/database.yml"
new file mode 100644
index 0000000..a66db6c
--- /dev/null
+++ "b/\173\173 cookiecutter._env_name \175\175/features/designate_bind9/database.yml"
@@ -0,0 +1,3 @@
+classes:
+- system.galera.server.database.designate
+- environment.{{ cookiecutter._env_name }}.features.designate_bind9