* reword INCR-483: Make compatible with Python 3.x without breaking Python 2.7 support

pick INCR-483: Re-run isort for lms/envs/test.py

INCR-483: change import order

INCR-483: PyLint fixes

* INCR-483: Fixes useless suppression

* INCR-483: Remove unused get_swagger_view

Python Requirements Update

INCR-467: Updates on Python 3.x

Don't pin Django to a patch version.

refactor the login user method

Update the version of matplotlib running in sandboxes.

Changelog can be found here: https://matplotlib.org/1.5.3/users/whats_new.html

This version fixes the odd setup.py in matplotlib that tries to install
numpy as a part of matplotlib setup.py execution.

Looking at the changelog I don't see any incompatibility issues just bug
fixes and feature additions.

Pin to the minor version so that we can get patches via the update
automation.  Since Django is pretty good at SemVer we can rely on these
to be pretty safe and it will speed up our security update process when
Django releases new security patches.

Update django version.

site config management cmd

remove discount banner display flag

INCR-465: Updates on Python 3.x and disable: import-error

Python Requirements Update

Flag added to load limited courses on Dashboard

Dashboard is set to load 250 courses instead of
all the courses. A flag is also added to change
the number the courses to load.

PROD-204

Fixed SGP setting

VideoModule to VideoBlock [SE-602]

Update enrollment support view

Python3 update

INCR-470

Python-modernize on edx-platform (369 of 380)

Currently, entitlement view is not displaying any message if there
are no records against a query.To improve user experience, changes
have been made so that a proper message would be displayed.

LEARNER-7155

Fixes template for incorrect trans escaping.

Added future absolute_import
changed unicode() with six.text_type()