[1.2.X] Fixed #15285 -- Corrected an erroneous import statement in the testing...

[1.2.X] Fixed #15285 -- Corrected an erroneous import statement in the testing docs. Thanks to kamal.mustafa for the report.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@15543 bcc190cf-cafb-0310-a4f2-bffc1f526a37