PARIS — With economic recovery barely there and talk of austerity spreading, many European workers are pushing back. French air traffic controllers walked off the job Tuesday just as Lufthansa pilots ended a strike and British Airways cabin crews voted to launch one of their own. Greek unions prepared to shut down much of their country Wednesday with wide-ranging strikes. And Total, Europe’s largest oil refiner, expects to sign an agreement with unions today to end a weeklong strike at its refineries in France, Bloomberg News reported.