7027: skip tests blocked by this bug

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23137 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Cope with UnicodeDecodeError on git svn output

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23138 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
7068: skip blocked test code, blocks other tests

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@23139 4ae1f11a-8b86-4847-b8af-ab372f36d1fd