edx/configuration — pull request #640 by jarv (2014-01-15 16:53:53+00:00)
Title: Improving the sandbox update script

This modifies the edx_ansible role to dump a clean var
file on disk that can be used for subsequent update runs
so that config vars will not be lost

also changes the ansible tmp directory to /var/tmp which is a better
location than using $HOME (used for debugging mostly)