Fix broken test for Python 2.x
Fix broken test for Python 2.x

Fun fact: for Python 3.x you don't need to explicitly implement __ne__
method if __eq__ exists, but you have do this for 2.x or your objects
may be equal and non-equal at the same time. Seems like, before
refactoring, operator.eq had used right logic.

selurvedu/python-json-patch,tyerq/python-json-patch,amith-reddy/python-json-patch