Merge branch 'issue#9' into 'dev-v2.8.1'

#9 - Fix the change in NFVIFA(18)00503 that changed the...

See merge request !65

src/yang/etsi-nfv-common.yang

@@ -437,6 +437,7 @@ submodule etsi-nfv-common {
         type identityref {
           base layer-protocol;
         }
+	min-elements 1;
         description
           "Identifies the protocols that the VL uses (Ethernet,
            MPLS, ODU2, IPV4, IPV6, Pseudo-Wire). The top layer