Increase RAM to avoid out of memory in stacks

Add splunk forwarder role to jenkins.
Merging in as-is for now to get it in the codebase. I think the inputs.conf values for the files that we're monitoring still need to be tweaked a bit. I'll put that in a subsequent PR. 
@benpatterson fwiw I did end up getting an initial stab at the build logs into this one.

Add graphviz back since it is used by the CS188x class.

video beacon feature flag and default variables

Use the V1 Hipchat token.

Installing OpenJDK on Insights Servers

This is needed to make use of Closure Compiler for JS minification.

Disable installation of the "certs" service, as it's not used in sandbox

Expose CORS_ORIGIN_ALLOW_ALL for testing in sandboxes

Make the welcome banner say Open edX

Add Birch release box files to Vagrant files

This fixes a startup error with the "certs" role: upon restart, the
"certs" supervisord service tries to contact the service through the
public port (which should be) served by NginX and fails.

Fix typo in supervisord log file names.

One build only.

Explicitly set MTU for interfaces to avoid jumbo frame bug.

Fix xqwatcher checking out code as wrong user

Add a migration script for Birch

ENABLE COUNTRY ACCESS

Part of the file name template is eaten up by Python's `%` formatting,
resulting in log files missing the `s` of "stderr" and "stdout".

typo

update mtu

Add a new insights setting.

Update AUTHORS