ubuntu_4ifaces_vnf: reorder interfaces in VDU to test order of the interface creation

Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

ubuntu_4ifaces_vnf/ubuntu_4ifaces_vnfd.yaml

@@ -55,7 +55,7 @@ vnfd:
     - id: eth1-int
       virtual-network-interface-requirement:
       - name: eth1
-        position: 2
+        position: 4
         virtual-interface:
           type: PARAVIRT
     - id: eth2-int
@@ -67,7 +67,7 @@ vnfd:
     - id: eth3-int
       virtual-network-interface-requirement:
       - name: eth3
-        position: 4
+        position: 2
         virtual-interface:
           type: PARAVIRT
     name: dataVM