nova: update filelist after xenapi removal
nova: update filelist after xenapi removal

nova dropped the xenapi related tests and driver  in commit
I42b302afbb1cfede7a0f7b16485a596cd70baf17

Change-Id: Ib5383ee57c6c2b9c1cb24bfa2cb337ab0f2b670a

openstack/rpm-packaging,openstack/rpm-packaging