No parallel movement of gripper and arm (throwing object example)

[Kaiser1401]

Trying to get the throwing example running i realised that there is (no longer?) the possibility to open the gripper while the arm is moving. Essentially not throwing the cube.

The interesting part is, that the planning seems to be delayed. I have not enough insight in Moveit2 yet to figure out exactly where this is coming from unfortunately.

Found while working on Jazzy-Harmonic adaptation ( https://github.com/AndrejOrsula/panda_ign_moveit2/pull/34 https://github.com/AndrejOrsula/ign_moveit2_examples/pull/27 )