Merge branch 'fix/ttl-security' into 'develop'

`bgp_config`: add multihop when ttl-security is selected

See merge request !276

geant/gap_ansible/roles/bgp_config/templates/nokia/deploy/bgp_neighbor.j2

@@ -7,6 +7,7 @@
                     {% endif %}
                     {% if neighbor.ttl_security is not none %}
                     <ttl-security>{{ neighbor.ttl_security }}</ttl-security>
+                    <multihop>{{ neighbor.ttl_security }}</multihop>
                     {% endif %}
                     {% if neighbor.ip_type == 'ipv4' %}
                     <local-address>{{ ipv4_local_addr }}</local-address>