* Fix unittest

* Fix pylint error: Line 915 too long

* Fix the conflicting files

* frontend operator support: space_to_batch_nd

* add test case for frontend operator support: space_to_batch_nd

* add test case for frontend operator support: space_to_batch_nd

* frontend operator support: space_to_batch_nd

* Fix ValueError: don't know how to convert type <class 'numpy.ndarray'> to node