dbusmock: Drop most variables from init.py #1448

Job	Run time
OS (registry.fedoraproject.org/fedora:rawhide)	1m 43s
OS (quay.io/centos/centos:stream10-development)	1m 38s
OS (docker.io/ubuntu:devel)	1m 52s
OS (docker.io/debian:unstable)	1m 53s
OS (docker.io/ubuntu:latest)	1m 54s
OS (registry.fedoraproject.org/fedora:latest)	2m 28s
OS (docker.io/ubuntu:rolling)	1m 50s
	13m 18s

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