Made GenericRelatedObjectManager consistent with other related managers w.r.t. use of core_filters attribute.
Made GenericRelatedObjectManager consistent with other related managers w.r.t. use of core_filters attribute.

Previously it had an unused keyword argument.

git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@16914 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django