Allow to deactivate SELinux separation for selected containers

Deactivating selinux separation for now will allow haproxy to access
its certificate without any issue.

Change-Id: Ia00219337737dca87f745af5519effc04ce0a620

docker/services/haproxy.yaml

@@ -229,6 +229,7 @@ outputs:
               image: {get_param: DockerHAProxyImage}
               net: host
               restart: always
+              security_opt: label=disable
               volumes:
                 list_concat:
                   - {get_attr: [ContainersCommon, volumes]}