Merge pull request #5131 from cpennington/split/prod-import-export-tests

cms/djangoapps/contentstore/tests/test_crud.py

cms/wsgi.py

...n/lib/xmodule/xmodule/modulestore/split_mongo/__init__.py

...dule/modulestore/split_mongo/caching_descriptor_system.py

...xmodule/modulestore/split_mongo/definition_lazy_loader.py

...odule/xmodule/modulestore/split_mongo/mongo_connection.py

common/lib/xmodule/xmodule/modulestore/split_mongo/split.py

...ib/xmodule/xmodule/modulestore/split_mongo/split_draft.py

...odule/xmodule/modulestore/tests/test_mixed_modulestore.py

...odule/xmodule/modulestore/tests/test_split_modulestore.py

common/lib/xmodule/xmodule/tests/__init__.py

.../data/manual-testing-complete/html/Duplicate_URL_Name.xml

...-complete/sequential/0aa765632f4d4b84ad8d96f41cec5825.xml

...a/manual-testing-complete/vertical/Duplicate_URL_Name.xml

lms/wsgi.py

requirements/edx/base.txt