Update CODEOWNERS
Update CODEOWNERS

Add research/lstm_object_detection entry
cshallue/models,cshallue/models,derekjchow/models,derekjchow/models,tombstone/models,tombstone/models,derekjchow/models,cshallue/models,alexgorban/models,tombstone/models,alexgorban/models,alexgorban/models,tombstone/models,tombstone/models,tombstone/models,cshallue/models,derekjchow/models,alexgorban/models,cshallue/models,alexgorban/models,derekjchow/models