Modified forms_tests to work with unittest2 discovery.
Modified test_utils to work with unittest2 discovery.
Modified test_client_override to work with unittest2 discovery.
Modified comment_tests for unittest2 discovery.
Modified generic_views for unittest2 discovery.
Modified model_fields for unittest2 discovery.
Modified template_tests for unittest2 discovery.
Modified utils_tests for unittest2 discovery.
Modified validation to work with unittest2 discovery.
Modified view_tests for unittest2 discovery.
Fixed template_tests so discovery doesn't directly find tests that require setuptools.
Fixed #20247 - Added some missing paths in the tutorial.

Thanks gsavix for the suggestion and patch.
Updated a renamed test file
Fixed #19874: Apply id attribute to the outer <ul> of CheckboxSelectMultiple
Fix #4117: Apply id attribute to the outer <ul> of RadioSelect.