add speed into templating payload (#525)

Author: mtarking

roles/dtc/common/templates/ndfc_interfaces/ndfc_interface_vpc.j2

@@ -23,6 +23,7 @@
     peer2_pcid: {{ switches[peer2].name | regex_replace('[^0-9]', '') }}
     port_type_fast: {{ switches[peer1].spanning_tree_portfast | default(defaults.vxlan.topology.switches.interfaces.topology_switch_trunk_po_interface.spanning_tree_portfast) }}
     mtu: {{ switches[peer1].mtu | default(defaults.vxlan.topology.switches.interfaces.topology_switch_trunk_po_interface.mtu) }}
+    speed: {{ switches[peer1].speed | default(defaults.vxlan.topology.switches.interfaces.topology_switch_trunk_po_interface.speed) }}
     pc_mode: {{ switches[peer1].pc_mode | default(defaults.vxlan.topology.switches.interfaces.topology_switch_access_po_interface.pc_mode) }}
     peer1_members: {{ switches[peer1].members | to_json }}
     peer2_members: {{ switches[peer2].members | to_json }}