Update rsyslog config.

The previous one did not work so updating it with a copy from production.
Allow the edx server user to send e-mail.
Externalize the django settings module as a variable.
Add a rule to run just migrations(no syncdb).
Add the dev2 playbook.
Add release to the dev2 playbook.
Add requests to ansible requirements so boto works correctly.
Fix typo in requirements file.
Upgrade boto to fix a parsing error.
Run only the plays for edxapp.
Rename for sandbox env.
Update workers as well.
Update my sandbox and add workers.
Replace the api_key line if it already exists.
Update the workers.
Update the sandbox name.
Update how workers are started.
Correct the worker hosts values.
Uncomment edxapp.