rename namespace for consistency


git-svn-id: http://josm.openstreetmap.de/svn/trunk@5910 0c6e7542-c601-0410-84e7-c038aed88b3b
fix #8639 - Handle purged primitives in validator errors

git-svn-id: http://josm.openstreetmap.de/svn/trunk@5911 0c6e7542-c601-0410-84e7-c038aed88b3b