AdvertiseOptions: include definitions of non-literal fields in connection header
AdvertiseOptions: include definitions of non-literal fields in connection header

(fixes rosbag things that rely on a message header being valid, and that have derped-up definition resolution code)

nickkazepis/ROS.NET,beanstalk42/ROS.NET,nickkazepis/ROS.NET,uml-robotics/ROS.NET,nickkazepis/ROS.NET