Fixes typo in openstack command
Fixes typo in openstack command

openstack user-list changed
to proper form of openstack command

Change-Id: If409ab26bf6266e0790a2d2cce18d28adb844702
Closes-Bug: #1503711

toby82/kolla,GalenMa/kolla,dardelean/kolla-ansible,limamauricio/mykolla,limamauricio/mykolla,GalenMa/kolla,rajalokan/kolla,mrangana/kolla,rajalokan/kolla,rajalokan/kolla,intel-onp/kolla,negronjl/kolla,dardelean/kolla-ansible,nihilifer/kolla,dardelean/kolla-ansible,limamauricio/mykolla,intel-onp/kolla,rahulunair/kolla,mrangana/kolla,negronjl/kolla,stackforge/kolla,toby82/kolla,toby82/kolla,mandre/kolla,rahulunair/kolla,stackforge/kolla,coolsvap/kolla,nihilifer/kolla,coolsvap/kolla,openstack/kolla,mandre/kolla,tonyli71/kolla,coolsvap/kolla,openstack/kolla,negronjl/kolla,mandre/kolla,tonyli71/kolla,stackforge/kolla