Minor fix in manila guide
Minor fix in manila guide

Change-Id: I584199dcc7adf8b9ae68cf34ddccb1d025c9714a

GalenMa/kolla,nihilifer/kolla,openstack/kolla,GalenMa/kolla,dardelean/kolla-ansible,rahulunair/kolla,coolsvap/kolla,coolsvap/kolla,intel-onp/kolla,rahulunair/kolla,mrangana/kolla,stackforge/kolla,openstack/kolla,dardelean/kolla-ansible,stackforge/kolla,coolsvap/kolla,stackforge/kolla,nihilifer/kolla,mandre/kolla,mrangana/kolla,intel-onp/kolla,mandre/kolla,dardelean/kolla-ansible,mandre/kolla