Reducing default memcaching of carrier preferences from 3600
seconds (60 minutes) to 900 seconds (15 minutes). After this
reduces the pain, we can consider refactoring to hit the local
endpoint to obtain the options.. Currently, the carrier prefs are
pulled remotely via an HTTP GET off of en.wikipedia instead of
with a straight wfMessage hit.. The three cases where the prefs
are cached rely upon self::getMaxAge(). self::getMaxAge()
is not invoked elsewhere, meaning this is isolated.

Change-Id: Ie86dc96fdd9e7cca482780cb1228d1394f07a4e9
Merge "Reducing default memcaching of carrier preferences from 3600 seconds (60 minutes) to 900 seconds (15 minutes). After this reduces the pain, we can consider refactoring to hit the local endpoint to obtain the options.. Currently, the carrier prefs are pulled remotely via an HTTP GET off of en.wikipedia instead of with a straight wfMessage hit.. The three cases where the prefs are cached rely upon self::getMaxAge(). self::getMaxAge() is not invoked elsewhere, meaning this is isolated."