add swift system classes

Change-Id: I60cf6048b05f928c5d2ab8344e1ce50d4eedb20e
diff --git a/swift/rings/init.yml b/swift/rings/init.yml
new file mode 100644
index 0000000..f157aff
--- /dev/null
+++ b/swift/rings/init.yml
@@ -0,0 +1,5 @@
+parameters:
+  swift:
+    ring_builder:
+      enabled: true
+      rings: []