Corrected app_loading test so it does not generate a key error when TZ is not set in the environment (e.g., on Windows).
Corrected app_loading test so it does not generate a key error when TZ is not set in the environment (e.g., on Windows).


git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@12379 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django