Updated openstack/openstack
Project: openstack/oslo.concurrency  a79b1ab59aee7e8c1af6f738b8fa29a9fe1f6cd2

Use six.wraps

There is a slight difference in functools.wraps on python3.x and
on python2.x in regards to the __wrapped__ attribute that the six
version makes transparent; so instead of using the functools one
just use the six one to gain the added compatability.

Change-Id: Iccf2aede08504469c148ee5f81f448cadfc08d5e