Haproxy is running on contrail nodes

I have found that haproxy is running on contrail nodes.
And haproxy has default configuration and not used by any service.

fuel plugins| grep contrail
contrail | 4.0.0 | 4.0.0

ps axuwww |grep haprox
root 14287 0.0 0.0 10432 668 pts/11 S+ 07:49 0:00 grep --color=auto haprox
haproxy 21369 0.0 0.0 28988 920 ? Ss Jul27 0:46 /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -D -p /var/run/haproxy.pid

 ls -la /etc/haproxy/
errors/ haproxy.cfg

/etc/haproxy/haproxy.cfg
global
        log /dev/log local0
        log /dev/log local1 notice
        chroot /var/lib/haproxy
        stats socket /run/haproxy/admin.sock mode 660 level admin
        stats timeout 30s
        user haproxy
        group haproxy
        daemon

        # Default SSL material locations
        ca-base /etc/ssl/certs
        crt-base /etc/ssl/private

        # Default ciphers to use on SSL-enabled listening sockets.
        # For more information, see ciphers(1SSL).
        ssl-default-bind-ciphers kEECDH+aRSA+AES:kRSA+AES:+AES256:RC4-SHA:!kEDH:!LOW:!EXP:!MD5:!aNULL:!eNULL

defaults
        log global
        mode http
        option httplog
        option dontlognull
        timeout connect 5000
        timeout client 50000
        timeout server 50000
        errorfile 400 /etc/haproxy/errors/400.http
        errorfile 403 /etc/haproxy/errors/403.http
        errorfile 408 /etc/haproxy/errors/408.http
        errorfile 500 /etc/haproxy/errors/500.http
        errorfile 502 /etc/haproxy/errors/502.http
        errorfile 503 /etc/haproxy/errors/503.http
        errorfile 504 /etc/haproxy/errors/504.http