Upgrade the ddt package to a version supports Python 3

This is to upgrade the ddt package from the old 0.8.0 version to the latest version that supports Python3
(version 1.2.0 as of this commit)

This commit is intended to close INCR-6 issue (see https://openedx.atlassian.net/browse/INCR-6 )

ARCH-223: Revert the revert of Replace Request Cache

ARCH-223

Fix event tracking for pathway buttons.

log npm installation on jenkins

added back add_assignment_type

Support for separate Journals frontend app

Clear cache after tests that create DarkLangConfig objects

[ENT-769] - Unlink learner from Enterprise Customer 

bump edx-sga to 0.8.3

EDUCATOR-3417: Remove flaky video test.

EDUCATOR-3418: Remove flaky completion test.

* test_render_xblock_publish_completion_is_sent_on_view

* test_video_language_menu_working

Switches to tracking pathway_uuid to match the original event proposal.

LEARNER-6087

EDUCATOR-3409: Remove flaky completion test.

* test_courseware_publish_completion_is_sent_on_view

Log conditional xblock fragment resource loading

Mergeback PR from private to public.

Update recommender-xblock version number

When sending a program cert to Credentials, also send along a
calculated visible_date along with it.

LEARNER-6262

EDUCATOR-3385 fix attribute error in discussion email notification

EDUCATOR-2714

Reveal industry pathways in program details sidebar

Fix entitlement expiring on switching session.

LEARNER-6313