secure-cookies: Allow to use secure HTTPS cookies (Django setting)

Cf https://docs.djangoproject.com/en/1.4/ref/settings/#std:setting-SESSION_COOKIE_SECURE
add paver test for bok-choy default command.
Added instructor persmission to _has_access_error_desc() in courseware.access.

TNL-208
enable auto-capturing of hars in bok-choy tests
add promise to get around race condition in discussion bok-choy test
Use new bok_choy file paths in paver examples.
wait for notification on adding video component
TNL-392
[TNL-198] Do not generate JS and CSS source maps in production
Video link obfuscation. [BLD-1230]
Merge pull request #5059 from edx/anton/add-video-context-menu

BLD-1230: Video Link Obfuscation
Merge pull request #5242 from edx/benp/testing-doc

Use new bok_choy file paths in paver examples.
Set paver command tests to run as part of unit test lib suites.
Revert "username and email request for lti module"

This reverts commit 3f159ea52bc2bec2de436d25b1c6e61e02c375dd.
Merge pull request #5118 from edx/benp/paver-tests

Add tests for paver bok_choy commands
Disable sending activation email also when doing external_auth and setting BYPASS_ACTIVATION_EMAIL_FOR_EXTAUTH=True
Merge pull request #5221 from edx/tim/sourcemaps-debug-only

Do not generate CSS source maps in production
Merge pull request #5251 from edx/ned/revert-lti-username-email

Revert "username and email request for lti module"
Merge pull request #5147 from edx/clytwynec/auto_capture_har_on_error

enable auto-capturing of hars in bok-choy tests
Merge pull request #5243 from edx/zub/bugfix/tnl-392-videocontrolstestfailure

wait for notification on adding video component
Upgrade scipy, lxml, boto