Today at 3 p.m., a committee will meet at St. Louis City Hall to discuss hiring a consultant to advise the city on its plan to "lease" St. Louis Lambert International Airport — basically, allowing a for-profit company to take over the city-owned airport.The meeting, people at City Hall caution, is only a very early step in a very long process. After the consultants are hired, they still have to find someone who wants to lease the thing and negotiate the terms.…