This setting was not actually not changing installation behavior, that
is being set by whether oauth_dispatch is in INSTALLED_APPS or not.
This flag was being used to:
* Hide enable/disable certain URL paths.
* We need these paths on all the time in the LMS because all other
services and MFE rely on oauth to authenticate with the LMS so we
just end up turning this on later in the settings stack.
* We use it to only run certain oauth_dispatch tests in the LMS test
environment because the oauth_dispatch app is not installed in the
CMS.
* We use the `skip_unless_lms` decorator now instead to do this or
just run the tests in both suites because they are valid tests in
both contexts.
92a47097b7