contrail_yum_repo_port and contrail_yum_repo_port is not customizable

[hkumarmk]

Those ports are hardcoded to 1567 and cannot customize during deployment as that will not work in kubernetes environment as kubernetes delete docker specific iptables chains and thus only host based network work.

This need to be fixed by making the port as variable to be passed to contrail-repo container in contrail-docker and pass appropriate port from contrail-ansible.