Fix for test that broke related to DRF;

added the updated dependency for oauth2

added the commit hash instead of branch

minor fix

changes made by make upgrade

This reverts commit bf88bca7.

The xblock counting script had a requirements file that was not
previously being tracked and had an out of date version of requests.
Add it to the `upgrade` make target so that it stays up to date.

Bumping edx-organizations will add history to the Organization model.

DE-1510

Fixes: https://openedx.atlassian.net/browse/INCR-16

Extra constraints needed to be added for pytest-randomly and tornado,
both of which have dropped Python 2 support.

This reverts commit f6c215ae.

(version 1.3.4 as of this commit)

This commit is intended to close INCR-8 issue (see https://openedx.atlassian.net/browse/INCR-8 )

This upgrades DOT by reverting the revert.

This reverts commit 4d8b9c36

ARCH-180