Add organization_authz_id base state record field

Fetch the authz information at the same time we fetch the org guid,
and stuff it into the base state record. This simplifies bits of the
organizations and association endpoints.
Use correct routine to fetch authz_id as well as org guid.
fetch_org_guid_and_authz -> fetch_org_metadata
DEV: chef_db from ma/fetch_org_authz
Merge branch 'ma/fetch_org_authz'