add simple help-modal-test
Return OpenID Connect user name from user profile.
Content experiments update

comments from Anant
Merge pull request #5295 from edx/adam/add-simple-help-modal-test

add simple help-modal-test
Merge pull request #5318 from edx/markhoeber-doc936

Content experiments update
Merge pull request #5315 from rocha/fix-fullname-in-oauth2-handler

Return OpenID Connect user name from user profile.
Use default locale to OpenID profile claims.

If the user has not selected a default locale, then return the default one.