Be nice to buildbots: switched `modeltests/files` to use a proper isolated directory for file storage
Be nice to buildbots: switched `modeltests/files` to use a proper isolated directory for file storage

git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@9222 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django