mcclient: 修复project-delete

- Hosts没有project概念，tenant=xx参数会被忽略
 - 指定tenant=xx需要同时指定admin=1才生效

pkg/mcclient/modules/mod_projects.go

@@ -241,8 +241,9 @@ func (this *ProjectManagerV3) Delete(session *mcclient.ClientSession, id string,
 func (this *ProjectManagerV3) DeleteInContexts(session *mcclient.ClientSession, id string, body jsonutils.JSONObject, ctxs []ManagerContext) (jsonutils.JSONObject, error) {
 	if ctxs == nil {
 		p := jsonutils.NewDict()
+		p.Add(jsonutils.JSONTrue, "admin")
 		p.Add(jsonutils.NewString(id), "tenant")
-		ret, e := Hosts.List(session, p)
+		ret, e := Servers.List(session, p)
 		if e != nil {
 			return nil, e
 		} else {