Fix SA2003, deferred Lock right after locking

pkg/registry/registrytest/service.go

@@ -121,7 +121,7 @@ func (r *ServiceRegistry) WatchServices(ctx api.Context, options *api.ListOption
 
 func (r *ServiceRegistry) ExportService(ctx api.Context, name string, options unversioned.ExportOptions) (*api.Service, error) {
 	r.mu.Lock()
-	defer r.mu.Lock()
+	defer r.mu.Unlock()
 
 	return r.Service, r.Err
 }