Bootstrap: add description field to ApiSubject constructor
Bootstrap: add description field to ApiSubject constructor

To workaround the constraints on ApiSubject.description:
  description nullable:false, blank: false

Set the description to reflect this is the Shibboleth IdP API account.

REANNZ/AAF-VHO,University-of-Auckland/AAF-VHO,REANNZ/AAF-VHO,University-of-Auckland/AAF-VHO,ausaccessfed/virtualhome,REANNZ/AAF-VHO,University-of-Auckland/AAF-VHO,ausaccessfed/virtualhome