contrib/respdiff: define startup order of containers

5 jobs for respdiff-startup in 1 minute and 10 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test
passed #202922
amd64 linux docker
test:flake8

00:00:18

passed #202921
amd64 linux docker
test:mypy

00:00:23

passed #202923
amd64 linux docker
test:pylint

00:00:26

passed #202924
amd64 linux docker
test:pytest

00:00:20

passed #202925
amd64 linux docker
test:respdiff

00:01:10