ofctl_v1_2: fix pep8
ofctl_v1_2: fix pep8

ryu/lib/ofctl_v1_2.py:444:15: E127 continuation line over-indented for visual indent

Signed-off-by: TAKAHASHI Minoru <1b2dd9db86d9aa32ea109f1bd7f72bf49e90d10b@gmail.com>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

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