ucberkeley_cas-7.x-beta2 update

* OPENUCB-273
** Apply https://www.drupal.org/node/2057881 which prevents an Ajax error during the install_profile_modules task of openberkeley.profile
* OPENUCB-328
** Disable the "Gateway" option in CAS 1.3 (Redirection >  "Check with the CAS server to see if the user is already logged in?").
   Using this in combination with "Automatically create Drupal accounts" can result in random user accounts being created when a user
   with a valid CAS ticket visits a page on a site with Drupal's CAS module configured this way.
** Do not require "access content" permission to visit the administrator backdoor. Some sites may deny that permission to anonymous.
** Refactor build script and makefiles.