Fixed migration of VM with shared disks

                          'memory': vm['mem'],

                          'volumes': []}

                for disk in vm.get('disk', '').split():

                    if vm.get('disk%s_shared' % disk, 'no') == 'no':

                        vmspec['volumes'].append({'pool': vm['disk%s_pool' % disk], 'size': int(vm['disk%s_size' % disk])})

                if 'target' in vm:

                    vmspec['target'] = vm['target']