RELENG-381: only create setup_complete file on first normal setup
RELENG-381: only create setup_complete file on first normal setup

I.e. not related to upgrade/restore scenarios
r=josh

joyent/sdc-headnode,kaizengarden/sdc-headnode,numericillustration/sdc-headnode,numericillustration/sdc-headnode,kaizengarden/sdc-headnode,joyent/sdc-headnode,kaizengarden/sdc-headnode,kaizengarden/sdc-headnode,joyent/sdc-headnode,numericillustration/sdc-headnode,joyent/sdc-headnode