~~~~~
* Add MockPatch, MockPatchMultiple, MockPatchObject - adapters to mock.
(Julien Danjou, Robert Collins)
* Fixture.setUp should no longer be overridden in subclasses. Instead
override _setUp. This permits the Fixture base class to detect failures
during _setUp and trigger any registered cleanups, attach any details
to the failure exception and propagate that to callers. Overriding of
setUp is still supported: this adds a new interface for simpler
implementation of the contract of a fixture.
(Robert Collins, 1456361, 1456353)