PS: do not list object as destroyed when they get attached #2864
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The information in the diff is redundant because attaching an object implies its removal from the PlanningScene.
In the unlikely case you relied on the REMOVE entry in the diff message, use the newly attached collision object to indicate the same instead.
Since fd88dd6 applying the message with both entries via
PlanningScene::usePlanningSceneMsg
fails, but messages generated byPlanningScene::getPlanningSceneDiffMsg
should always be accepted there!This currently breaks task execution through the MTC capability here whenever an object becomes attached (e.g., in the pick-place demo - aside from the missing frame issue).
Edit: also warn when anything tries to remove a world object that does not exist.