Rename onadmin_prepare_sles12_compute_repo to ...cloud_repo
Rename onadmin_prepare_sles12_compute_repo to ...cloud_repo

This matches better what it does now, as SLE12 is not compute-only
anymore in Cloud 6.

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