Update the description of project in releasenotes.
Update the description of project in releasenotes.

Change-Id: I1fe0e52d2e049d34666a6d94bac1d85b91a78b19

openstack/python-openstackclient,dtroyer/python-openstackclient,openstack/python-openstackclient,dtroyer/python-openstackclient