Adding DeleteResult for v3.services.Delete
diff --git a/openstack/identity/v3/services/results.go b/openstack/identity/v3/services/results.go
index dcd7fe2..0653198 100644
--- a/openstack/identity/v3/services/results.go
+++ b/openstack/identity/v3/services/results.go
@@ -42,6 +42,11 @@
 	commonResult
 }
 
+// DeleteResult is the deferred result of an Delete call.
+type DeleteResult struct {
+	commonResult
+}
+
 // Service is the result of a list or information query.
 type Service struct {
 	Description *string `json:"description,omitempty"`