update path to mo (#2993)

Author: Julia Kamelina

tools/model_tools/src/openvino/model_zoo/omz_converter.py

@@ -218,7 +218,9 @@ def main():
                 mo_path = Path(mo_executable)
             else:
                 try:
-                    mo_path = Path(os.environ['INTEL_OPENVINO_DIR']) / 'tools/model_optimizer/mo.py'
+                    mo_path = Path(os.environ['INTEL_OPENVINO_DIR']) / 'tools/mo/openvino/tools/mo/mo.py'
+                    if not mo_path.exists():
+                        mo_path = Path(os.environ['INTEL_OPENVINO_DIR']) / 'tools/model_optimizer/mo.py'
                 except KeyError:
                     sys.exit('Unable to locate Model Optimizer. '
                         + 'Use --mo or run setupvars.sh/setupvars.bat from the OpenVINO toolkit.')