add paver test for bok-choy default command.
Use new bok_choy file paths in paver examples.
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.
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