ryu_manager.rst

Signed-off-by: Minoru TAKAHASHI <takahashi.minoru7@gmail.com>
flags.py

Signed-off-by: Minoru TAKAHASHI <takahashi.minoru7@gmail.com>
tester.py

Signed-off-by: Minoru TAKAHASHI <takahashi.minoru7@gmail.com>
fix pep8

Signed-off-by: Minoru TAKAHASHI <takahashi.minoru7@gmail.com>