automation: wait_for allow custom output while waiting
automation: wait_for allow custom output while waiting

For some long commands it would be nice to get some extra output
while they are running. This allows to pass a 6th arg to wait_for
that would get evaluated instead of the usual dots.

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