no naked returns in go; fix auth v3 unit tests
diff --git a/openstack/objectstorage/v1/containers/requests.go b/openstack/objectstorage/v1/containers/requests.go
index ba11916..a668673 100644
--- a/openstack/objectstorage/v1/containers/requests.go
+++ b/openstack/objectstorage/v1/containers/requests.go
@@ -109,11 +109,13 @@
 		r.Header = resp.Header
 	}
 	r.Err = err
+	return
 }
 
 // Delete is a function that deletes a container.
 func Delete(c *gophercloud.ServiceClient, containerName string) (r DeleteResult) {
 	_, r.Err = c.Delete(deleteURL(c, containerName), nil)
+	return
 }
 
 // UpdateOptsBuilder allows extensions to add additional parameters to the
@@ -171,6 +173,7 @@
 		r.Header = resp.Header
 	}
 	r.Err = err
+	return
 }
 
 // Get is a function that retrieves the metadata of a container. To extract just
@@ -184,4 +187,5 @@
 		r.Header = resp.Header
 	}
 	r.Err = err
+	return
 }