[TIP] unittest2 supported versions

[Robert Collins]

unittest2 serves as a backport of unittest features to older python.

What versions does it need to support?

It currently supports 2.4+, but even 2.6 is now fully dead.

So I'd like to suggest that the versions which Python itself is doing
security fixes on be the only versions that we test against - I don't
want to have to run non-security-supported releases of Python in order
to test that new releases of unittest2 work.

-Rob

-- 
Robert Collins <rbtcollins at hp.com>
Distinguished Technologist
HP Converged Cloud