Add docs for QoS specs
Add docs for QoS specs

QoS v1 was recently included in openstackclient. We should include
command object docs.

Change-Id: I891231be095324bf55eb7ee4bb86debdf7a26f05

openstack/python-openstackclient,openstack/python-openstackclient,BjoernT/python-openstackclient,BjoernT/python-openstackclient,redhat-openstack/python-openstackclient,dtroyer/python-openstackclient,redhat-openstack/python-openstackclient,dtroyer/python-openstackclient