Fix alloc-dealloc-mismatch(new->free) in test_info_by_topic (#469) (#569)
Fix alloc-dealloc-mismatch(new->free) in test_info_by_topic (#469) (#569)

Signed-off-by: y-okumura-isp <f87bc0fd31328561bebb104855c1d20474f2908a@isp.co.jp>
ros2/rcl,ros2/rcl