Fix bug STUD-103. The url base for about page links needs to be www.edx....

...org for Drupal site, vs. LMS_BASE which is used for Studio. Note that the complete URL is still not correct, but a redirect exists to take it to the new location.

Here is my code coverage result:
Diff Coverage

Coverage Report: reports/cms/coverage.xml

Diff: master

Source File	Diff Coverage (%)	Missing Line(s)
cms/djangoapps/contentstore/utils.py	100%	 
cms/djangoapps/contentstore/tests/test_utils.py	100%	 
Total: 24 line(s)
Missing: 0 line(s)
Coverage: 100%