Modified the test_client tests to use the non-deprecated mail API.
Modified the test_client tests to use the non-deprecated mail API.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%4014187

adieu/django-nonrel,adieu/django-nonrel,adieu/django-nonrel