Fix typo in docstring
Fix typo in docstring

Change-Id: If907bd4e1d29c555565d12d4f33604e514090d99

ilay09/keystone,mahak/keystone,openstack/keystone,ilay09/keystone,mahak/keystone,openstack/keystone,ilay09/keystone,openstack/keystone,rajalokan/keystone,mahak/keystone,rajalokan/keystone,rajalokan/keystone