Make the result of Timestamp(x) != Timestamp(x) be False.
In python 2.7 this requires the __ne__ method to be defined [1].
"The truth of x==y does not imply that x!=y is false." The
functools.total_ordering decorator does not autocreate a __ne__
method.
In python 3 the __ne__ method is not required [2]. "By default,
__ne__() delegates to __eq__() and inverts the result".
This patch puts back the __ne__ method removed in [3]. Whilst no tests
fail on master with python2.7, they do on this patch [4] and it seems
dangerous to have this absurd behaviour lurking.
[1] https://docs.python.org/2/reference/datamodel.html#object.__ne__
[2] https://docs.python.org/3.4/reference/datamodel.html#object.__ne__
[3] Change-Id: Id26777ac2c780316ff10ef7d954c48cc1fd480b5
[4] Change-Id: Ia597cd460bb5fd40aa92e886e3e18a7542603d01
Change-Id: I01fbfa310df3c74390f8e8c2e9ffff81bbf05e47
a1776b9c1f