logilab-common #9384 adapt to unittest2 / discover [validation pending]

It looks like http://pypi.python.org/pypi/discover will be part of the stdlib for python2.7 and python3.2. I suppose that would deprecate logilab.common.testlib's own test discovery mechanism.

priorityimportant
typeenhancement
done in0.54.0
load5.000
load left0.000
closed by<not specified>