conifer/settings.py: putting public at the head of the schemas list

conifer/settings.py: putting public at the head of the schemas list

Since our backend derives the search_path from DATABASE_PG_SCHEMAS,
and since some of the utility tables in Django have no explicit
schema, a 'syncdb' action will create those tables in the first schema
in the list. Therefore, start with 'public', unless you have an
awesome reason why not to.

git-svn-id: svn://svn.open-ils.org/ILS-Contrib/servres/branches/eg-schema-experiment@772 6d9bc8c9-1ec2-4278-b937-99fde70a366f