Add new config vars

Gerrit has added in a few extra config variables that it wants
specifically set. Make sure we set them so we don't have issues with the
module restarting

Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>
Make sure the init script gets linked in

The Gerrit init script does not link itself into SysV or systemd make
sure a link into the SysV init.d happens as the script isn't a systemd
script.

Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>