Merge pull request #7714 from edx/enable-pdb-debugging

docs/en_us/internal/testing.rst

pavelib/acceptance_test.py

pavelib/bok_choy.py

pavelib/paver_tests/test_paver_bok_choy_cmds.py

pavelib/tests.py

pavelib/utils/test/suites/acceptance_suite.py

pavelib/utils/test/suites/bokchoy_suite.py

pavelib/utils/test/suites/nose_suite.py

pavelib/utils/test/suites/suite.py