make executor disappearing test a bit clearer

Signed-off-by: Momchil Atanasov <m.momchil@gmail.com>
update for new staging api (pub/sub)

Signed-off-by: Momchil Atanasov <m.momchil@gmail.com>
kill the right executor

Signed-off-by: Momchil Atanasov <m.momchil@gmail.com>