Merge pull request #7641 from open-craft/eugeny/problem-type-search

cms/djangoapps/contentstore/courseware_index.py

...oapps/contentstore/management/commands/reindex_library.py

...ntstore/management/commands/tests/test_reindex_library.py

cms/djangoapps/contentstore/signals.py

cms/djangoapps/contentstore/tasks.py

cms/djangoapps/contentstore/tests/test_courseware_index.py

cms/djangoapps/contentstore/tests/test_libraries.py

cms/envs/aws.py

cms/envs/bok_choy.py

cms/envs/common.py

cms/envs/devstack.py

cms/envs/test.py

common/lib/xmodule/xmodule/capa_module.py

common/lib/xmodule/xmodule/library_tools.py

common/lib/xmodule/xmodule/modulestore/__init__.py

common/lib/xmodule/xmodule/modulestore/django.py

common/lib/xmodule/xmodule/modulestore/mongo/base.py

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

common/lib/xmodule/xmodule/tests/test_capa_module.py

common/lib/xmodule/xmodule/tests/test_library_content.py