qemumonitorjsontest: AddNetdev: Use real variant

QEMU now formalized the arguments of netdev-add in the schema, so we
must use a real type to pass the schema validation once the schema is
updated.

The 'user' variant doesn't have any other mandatory fields.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

tests/qemumonitorjsontest.c

@@ -1308,7 +1308,7 @@ GEN_TEST_FUNC(qemuMonitorJSONDump, "dummy_protocol", "elf",
               true)
 GEN_TEST_FUNC(qemuMonitorJSONGraphicsRelocate, VIR_DOMAIN_GRAPHICS_TYPE_SPICE,
               "localhost", 12345, 12346, "certsubjectval")
-GEN_TEST_FUNC(qemuMonitorJSONAddNetdev, "id=net0,type=test")
+GEN_TEST_FUNC(qemuMonitorJSONAddNetdev, "id=net0,type=user")
 GEN_TEST_FUNC(qemuMonitorJSONRemoveNetdev, "net0")
 GEN_TEST_FUNC(qemuMonitorJSONDelDevice, "ide0")
 GEN_TEST_FUNC(qemuMonitorJSONAddDevice, "some_dummy_devicestr")