Migrate yang models in monorepo

Related to #187 (closed)

controller/nucleus/principalNetworkDomain_test.go

@@ -267,7 +267,7 @@ func Test_pndImplementation_MarshalDevice(t *testing.T) {
 		{
 			name:    "default",
 			args:    args{did},
-			want:    "{\n\t\"Acl\": null,\n\t\"Bgp\": null,\n\t\"Components\": null,\n\t\"Interfaces\": null,\n\t\"LocalRoutes\": null,\n\t\"Messages\": null,\n\t\"NetworkInstances\": null,\n\t\"RoutingPolicy\": null,\n\t\"System\": null\n}",
+			want:    "{\n\t\"Acl\": null,\n\t\"Bfd\": null,\n\t\"Components\": null,\n\t\"Interfaces\": null,\n\t\"Keychains\": null,\n\t\"LocalRoutes\": null,\n\t\"Messages\": null,\n\t\"NetworkInstances\": null,\n\t\"RoutingPolicy\": null,\n\t\"System\": null\n}",
 			wantErr: false,
 		},
 	}