clean up tmp test files in the end

reapply from trunk

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22984 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
7025: issue with python3 and unicode string

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22985 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Use cuni rather than unicode

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22987 4ae1f11a-8b86-4847-b8af-ab372f36d1fd