locking version of requests-oauthlib to 0.4.0

Serve ORA2 JavaScript i18n strings

Update test database cache

Added logging for sender email address on BotoServerError.

LMS-2734

requests version 1.2.3 does not appear to be compatible with the
new version of requests-oauthlib.

requests-oathlib tries to import to_native_string in util.py:

```
File
"/root/.virtualenvs/edx-platform/local/lib/python2.7/site-packages/requests_oauthlib/oauth1_auth.py",
line 10, in <module>
    from requests.utils import to_native_string
ImportError: cannot import name to_native_string
```

Annotation Tools Reverting commit @3bfb633f and updating openseadragon.js for latest build

Deprecated unit tests from rake to paver

Bok choy tests should not all run as global staff

Bugfix certificates request queue HTML flattening

Ahodges/documentation/doc307

Annotation Tool: Urgent update for ChinaX AB Testing

Remove duplicates in a class list so tests aren't duplicated

Update ddt to 0.8.0

Annotation Tools: Fix delete bug and factor out xmodule settings

Removed print context

Extract i18n strings from *.underscore files using django-babel-underscore

Skip video cc test BLD-1115

Reformats markdown problem templates avoid extra line breaks.

Add support for search spell corrections to Forums UX.

Co-authored-by: Brian Talbot <btalbot@edx.org>

JIRA: FOR-591

This reverts commit 9e9e69ac.

- Fixed camel case for variable name
- Fixed indentation in imageannotation.html
- Changed all mentions of Instructor Username to Email
- Turned annotation_mode into phrase
- Fixed indentation in imageannotation.html
- Added comments in imageannotation.html

- Changing annotation_mode in OSDA

Implement a custom editor for the split_module.