Finalize Rackspace acceptance tests and fix various things
diff --git a/rackspace/db/v1/configurations/requests.go b/rackspace/db/v1/configurations/requests.go
index 088b7ca..bb75f5a 100644
--- a/rackspace/db/v1/configurations/requests.go
+++ b/rackspace/db/v1/configurations/requests.go
@@ -104,7 +104,7 @@
 	}
 
 	_, res.Err = client.Request("POST", baseURL(client), gophercloud.RequestOpts{
-		OkCodes:      []int{201},
+		OkCodes:      []int{200},
 		JSONBody:     &reqBody,
 		JSONResponse: &res.Body,
 	})
@@ -216,7 +216,9 @@
 	return res
 }
 
-// Delete will permanently delete a configuration group.
+// Delete will permanently delete a configuration group. Please note that
+// config groups cannot be deleted whilst still attached to running instances -
+// you must detach and then delete them.
 func Delete(client *gophercloud.ServiceClient, configID string) DeleteResult {
 	var res DeleteResult