Removed an inadvertent raise statement added in [8777] and added the printing...

Removed an inadvertent raise statement added in [8777] and added the printing of tracebacks for template tests that raise an unhandled exception.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@10183 bcc190cf-cafb-0310-a4f2-bffc1f526a37