Move message queue to the node [#3322]
Closes #3322 (closed). Moves the simulator's message queue to the nodes such that each node keeps its own queue, which prevents nodes from accidentally interfering with each other.
Changelog: fix
Closes #3322 (closed). Moves the simulator's message queue to the nodes such that each node keeps its own queue, which prevents nodes from accidentally interfering with each other.
Changelog: fix