removing git accounts for notifier repo, open now

add datadog api key Since this file will be the model for others
to use for their vars files, put in a placeholder DD api key, since
it's required to be *something* currently.

celerybeat wants to write its pidfile to ~notifier/src.  Not sure why
the PID or CELERYD_PID_FILE environment variables don't correctly point
it to /var/run/... but in the meantime, this should get us by.

notifier: remove git_ssh wrapper not needed now that repo is public

run notifier on first util machine only

remove references to forums_digest.sh. File was a vestige of prior
code when this was run from cron instead of celery beat.

Factor out xqueue vars into own vars file, plus minor changes

nginx configuration for long site names

Set carnegie local relative to carnegie secure, so we have to get the
prefixes right once only.

Update to use the new commit variable.

collectstatic cleanup

rake gather_assets replaces collectstatic
so all references and logic to handle both
are removed

removes collect_static.yml since now there are
only two tasks for rake gather_assets.

support ansible 1.3

These are some minimal changes to support 1.3, does not yet include role
dependencies.

sandbox-ora: Include xqueue & ORA on the `edx_sandbox` playbook

Feanil/update vpc tools

The previous one did not work so updating it with a copy from production.