Fix date unit test

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22780 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Unit test python3 fixes

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22782 4ae1f11a-8b86-4847-b8af-ab372f36d1fd