Preparing for Melodic sync 2021-05-10

Melodic currently has 0 regressions and 55 packages ready to sync.

I’m going to start holding Melodic packages as of today, May 10, and plan to do a sync next week.

The main reason for this sync is to address the genpy regression. It would be really good to get testing from those who were affected by the previous bug before this sync goes out.

Please reply here if there are any other outstanding issues I should know about before performing a sync.

Just tested our setup that currently fails with packages from main ROS repo and everything is fixed as expected with current ros-testing, so the genpy fix works.
Thanks for the quick fix.

The sync is out.