Fixed #7499 -- Trim microseconds off rendering of form.TimeFields by default so

that they validate. Previous code didn't work with microseconds anyway, so this
is backwards compatible. Thanks to kevin for the patch.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@8491 bcc190cf-cafb-0310-a4f2-bffc1f526a37