crowbar-prep.sh: Invoke parse_opts before init_variables
crowbar-prep.sh: Invoke parse_opts before init_variables

This is necessary so that $CLOUD_VERSION is correctly propagated when
it's specified on the command line (otherwise it's always '3').

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