These changes mirror systemd tunables for elasticsearch and are needed
to ensure any OS without systemd (like Ubuntu 14.04) has the same
capabilities and OS's with systemd. This also adds a specific sysctl
file to use when making sysctl changes. This will ensure we're not
subjecting our deployment to other changes from other sources, like an
OSA playbook run.
Change-Id: Ic0e0bc0f93a12298c1e2f634cf5a1b4c6be2995e
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>
4c86cb9be2