osmo-ns-dummy: allow to create dynamic NSEs

Without setting the flag the osmo-ns-dummy won't create
any dynamic NSEs.
This flag will be removed in a future release but for now
it will be included.

Related: SYS#5208
Change-Id: I196cc454b5d7bc53848f73596a2f92730b78922b
diff --git a/utils/osmo-ns-dummy.c b/utils/osmo-ns-dummy.c
index 6790b4c..a2070ca 100644
--- a/utils/osmo-ns-dummy.c
+++ b/utils/osmo-ns-dummy.c
@@ -226,6 +226,7 @@
 		exit(1);
 	}
 
+	gprs_ns2_dynamic_create_nse(nsi, true);
 	gprs_ns2_vty2_init(nsi);
 	rc = vty_read_config_file(config_file, NULL);
 	if (rc < 0 && config_given) {