multi: rename chan DB Open method to OpenForTesting

htlcswitch/circuit_test.go

@@ -625,9 +625,7 @@ func makeCircuitDB(t *testing.T, path string) *channeldb.DB {
 		path = t.TempDir()
 	}
 
-	db, err := channeldb.Open(path)
-	require.NoError(t, err, "unable to open channel db")
-	t.Cleanup(func() { db.Close() })
+	db := channeldb.OpenForTesting(t, path)
 
 	return db
 }