[1.2.X] Modified wrong expected model formset output in a couple of additional...

[1.2.X] Modified wrong expected model formset output in a couple of additional tests after fix introduced in [15424]. Refs #15167.

Backport of [15430] from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@15431 bcc190cf-cafb-0310-a4f2-bffc1f526a37