Crash due to object delete operations, the Object disposal plugin now calls the delete model ROS service from its own thread. It works well most of the time but some crashes are observed sporadically.
Less debug printing from the Gazebo plugins that just flooded the console with messages that were not very informative.
Issues not addressed
It has been observed that crashes happen when objects that came into contact with Vacuum gripper are deleted. It's likely that an invalid pointer to a deleted object may linger around.
This PR improves on the following issues:
Issues not addressed
@alex07zzz or @lianjunli please review