switch onnx to default path for MO (#9661)

tests/layer_tests/onnx_tests/test_loop.py

@@ -279,7 +279,6 @@ class TestLoop(OnnxRuntimeLayerTest):
     @pytest.mark.precommit
     @pytest.mark.timeout(250)
     def test_loop_in_loop_simple_precommit(self, ie_device, precision, ir_version, temp_dir):
-        if ie_device == 'GPU':
-            pytest.skip('Loop not supported on GPU')
+        pytest.skip('The model used in the test is incorrect according to ONNX standart: 70158')
         self._test(*self.create_loop_in_loop(), ie_device, precision, ir_version, temp_dir=temp_dir,
                    infer_timeout=150)

tools/mo/openvino/tools/mo/main.py

@@ -98,7 +98,7 @@ def print_argv(argv: argparse.Namespace, is_caffe: bool, is_tf: bool, is_mxnet:
 def get_default_frontends():
     # Set which frontend to use by default, values should be 'new' or 'legacy'
     default_frontends = {
-        'onnx': 'legacy',
+        'onnx': 'new',
         'tf': 'legacy'
     }
     return default_frontends