By Luc Olinga The billionaire, who has kept a low profile lately, faces a lawsuit from a former housekeeper for discrimination. He denies the charges. Billionaire Jeff Bezos has been keeping a low profile in recent months. He briefly broke his silence last month to issue a dire warning about the economy at a time when economic concerns are running high. “Yep, the probabilities in this economy tell you to batten down the hatches,” Bezos posted on Twitter on Oct. 18. People should prepare for an economic crisis that appears on the horizon, Amazon’s executive chairman is warning. Discrimination C…