Missing timestamp in OutputPathsMsg

[Finn2708]

Hi,

I would like to synchronize the messages from the /scan and /output_paths topics to process the LaserScan data depending on the active_monitoring_case from the OutputPathsMsg.

However, OutputPathsMsg does not feature a header or timestamp, so I can only assume that the latest OutputPathsMsg belongs to the latest LaserScan message. It would be nice if OutputPathsMsg had a header, so I could synchronize manually or use message_filters::TimeSynchronizer.

Would you be open to extending OutputPathsMsg or adding something like OutputPathsStampedMsg?

[lenpuc]

Hi, you could provide a PR with your needed changes. And I will have a look at it once I am back in office in October