Adding DeleteResult for v3.endpoints.Delete
diff --git a/openstack/identity/v3/endpoints/results.go b/openstack/identity/v3/endpoints/results.go
index f559b9a..9f41eca 100644
--- a/openstack/identity/v3/endpoints/results.go
+++ b/openstack/identity/v3/endpoints/results.go
@@ -41,6 +41,11 @@
 	commonResult
 }
 
+// DeleteResult is the deferred result of an Delete call.
+type DeleteResult struct {
+	commonResult
+}
+
 // Endpoint describes the entry point for another service's API.
 type Endpoint struct {
 	ID           string                   `mapstructure:"id" json:"id"`