6918: .deb package more compliant according to Debian policy

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22766 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Fix and move db unit tests

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22768 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Fix bug in unit test script

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@22770 4ae1f11a-8b86-4847-b8af-ab372f36d1fd