fix 2240: fix the default master flag
fix 2240: fix the default master flag

tombstone/models,cshallue/models,jiaphuan/models,tombstone/models,alexgorban/models,derekjchow/models,jiaphuan/models,jiaphuan/models,derekjchow/models,derekjchow/models,jiaphuan/models,cshallue/models,jiaphuan/models,alexgorban/models,cshallue/models,cshallue/models,tombstone/models,derekjchow/models,derekjchow/models,tombstone/models,alexgorban/models,alexgorban/models,tombstone/models,jiaphuan/models,alexgorban/models,cshallue/models,tombstone/models