Added /test_data/ to .gitignore
Added /test_data/ to .gitignore

* scenes/_test_lobby_videos.py and scenes/scene_test.py use this directory.

deathmetalland/IkaLog,hasegaw/IkaLog,hasegaw/IkaLog,deathmetalland/IkaLog,deathmetalland/IkaLog,hasegaw/IkaLog