Same Target change behavior for all pedestrians in a group

[Problem]

Currently, targets are assigned to agents individually (sources, target changers). This can lead to a splitting of the group, e.g.:

• If some group-members step on a target changer and some others do not.
• If the target changer algorithm provides different targets for each group member.

In the worst case, agents even get stuck. Please find issue #309 (closed).

[Solution]

If a pedestrian is in a group, the target should be changed group-wise.

[Steps]

Adjust the setTargets method in Pedestrian.class. Add all group members to processedAgents in the TargetChangerController.class.

[Note]

Adjusting the TargetChangerController.class only, is not suitable, because the target can also be changed using TraCI. Therefore, it must be directly changed in Pedestrian.class.