Use ansible_mitogen to let ansible run faster.

1 job for master in 28 seconds (queued for 3 seconds)
Name Stage Failure
build-buster Test
dpkg-buildpackage: info: source changed by Elena Grandi <>
dpkg-source --before-build .
dpkg-buildpackage: info: host architecture amd64
dpkg-checkbuilddeps: error: Unmet build dependencies: debhelper-compat (= 13) python3-docutils
dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied; aborting
dpkg-buildpackage: warning: (Use -d flag to override.)
debuild: fatal error at line 1182:
dpkg-buildpackage -us -uc -ui failed
ERROR: Job failed: exit code 1