Update ORA2 repo version

Fix Python tests

Upgrade Recommender XBlock version

Remove unnecessary requirements and update bleacher usage

Keep html5lib unpinned

Upgrading requirements

Ignore python-interpolate-html for bleached html

Update old transcripts metadata present in video xml with the new transcripts for backward compatibility.

The published fork seems to be getting updates more regularly than the original project
and has the bugfix we forked for.

Bumps xblock-utils to v1.1.1
Bumps xblock-drag-and-drop-v2 to v2.1.6

React code (in jsx files) was not being extracted at all. Fixed this
by updating to edx-i18n-tools 0.4.5.

Also, template literals (feature of es2015) don't work well with
gettext at all. So convert those instances to HtmlUtils or
StringUtils interpolation calls.

FEDX-505

This reverts commit a7fa0c21.