Fix generated commit message for python-openstackclient
Fix generated commit message for python-openstackclient

The output of "openstack --version" is "openstack x.y.z". The expected
output of "$CLIENT --version" is "x.y.z". This patch will remove
"openstack " from the output of "openstack --version" to form a correct
commit message.

Change-Id: Ie2f111c8a6fa85e358d5945828e28281d7e78fe6

openstack/openstack-doc-tools,openstack/openstack-doc-tools