schema mount UPDATE support for creating nested data

Not just parsing it directly.
diff --git a/tests/utests/extensions/test_yangdata.c b/tests/utests/extensions/test_yangdata.c
index e9486d2..e7e7bc1 100644
--- a/tests/utests/extensions/test_yangdata.c
+++ b/tests/utests/extensions/test_yangdata.c
@@ -234,7 +234,7 @@
 }
 
 static void
-test_data(void **state)
+test_parse(void **state)
 {
     struct lys_module *mod;
     struct lysc_ext_instance *e;
@@ -266,7 +266,7 @@
     const struct CMUnitTest tests[] = {
         UTEST(test_schema, setup),
         UTEST(test_schema_invalid, setup),
-        UTEST(test_data, setup),
+        UTEST(test_parse, setup),
     };
 
     return cmocka_run_group_tests(tests, NULL, NULL);