Revision 2451

* test/test_load.py (TestAltPath.test_01_single_path_error_fix)
(TestAltPath.test_02_path_error_fix_from_list)
(TestAltPath.test_05_path_error_fix_from_list_changed)
(TestAltPath.test_06_path_error_fix_from_list_fails): self.session
is destroyed in tearDown, so there's no need to do it in a test
case.

* Thuban/Model/load.py (SessionLoader.open_shapefile): Remove a
debug print