cleanup: LURenameCluster wrong variable name
cleanup: LURenameCluster wrong variable name

Reviewed-by: amishchenko

yiannist/ganeti,bitemyapp/ganeti,onponomarev/ganeti,mbakke/ganeti,apyrgio/ganeti,leshchevds/ganeti,grnet/snf-ganeti,yiannist/ganeti,bitemyapp/ganeti,ganeti/ganeti,apyrgio/ganeti,leshchevds/ganeti,dimara/ganeti,leshchevds/ganeti,mbakke/ganeti,ganeti/ganeti,onponomarev/ganeti,ganeti-github-testing/ganeti-test-1,andir/ganeti,andir/ganeti,apyrgio/snf-ganeti,dimara/ganeti,mbakke/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,apyrgio/snf-ganeti,grnet/snf-ganeti,yiannist/ganeti,andir/ganeti