qa_crowbarsetup: use onadmin_ prefix
qa_crowbarsetup: use onadmin_ prefix

for functions that are running on the admin node
to complement the oncontroller_ prefix

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