MINOR: Replaced usage of renamed classes with the new namespaced name.
From: Sam Minnee <sam@silverstripe.com>
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/cms/trunk@90076 467b73ca-7a2a-4603-9d3b-597d59a354a9
BUGFIX Use of getOwnerID() in ReportAdmin which doesn't make sense, since ID() is sufficient.
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/cms/trunk@63748 467b73ca-7a2a-4603-9d3b-597d59a354a9