hackfest_epasriov_vnf: minor fix in interface position

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

hackfest_epasriov_vnf/hackfest_epasriov_vnfd.yaml

@@ -76,7 +76,7 @@ vnfd:vnfd-catalog:
                     type: PARAVIRT
                 internal-connection-point-ref: dataVM-internal
             -   name: xe0
-                position: '2'
+                position: 2
                 type: EXTERNAL
                 virtual-interface:
                     type: SR-IOV