Improve the robustness of the TopicEndpointInfo constructor#3013

jmachowinski merged 2 commits intoros2:rollingros2/rclcpp:rollingfrom

Barry-Xu-2018:review/topic-improve-code-robustnessBarry-Xu-2018/rclcpp:review/topic-improve-code-robustnessCopy head branch name to clipboard