allow trackupstream script to edit the jenkins job config directly
allow trackupstream script to edit the jenkins job config directly

The cloud-trackupstream-matrix script can now directly modify the
fetched jobs (fetched via japi). It replaces the axis configuration
and the combination filter (a groovy script). All these are dynamically
generated from its internal config hash.

We (only) change this hash according to our needs.
The workflow is:
- change the hash according to our needs and create a git commit
- fetch job (via japi)
- if there is a diff, create a new git commit
- let cloud-trackupstream-matrix.pl adapt the job
- create a new git commit
- push job (via japi)

vmoravec/automation,gosipyan/automation,vmoravec/automation,vmoravec/automation,vmoravec/automation,gosipyan/automation,gosipyan/automation,aspiers/automation,SUSE-Cloud/automation,aspiers/automation,SUSE-Cloud/automation,aspiers/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,aspiers/automation,gosipyan/automation