qa_crowbarsetup: add explicit timeout to nova boot
qa_crowbarsetup: add explicit timeout to nova boot

to avoid failures like
https://ci.suse.de/view/Cloud/view/Builds/job/openstack-mkcloud/15357/console
where it ended with
Build timed out (after 60 minutes)
and did not collect supportconfigs = issue #728

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