Kevin Hart is used to entertaining audiences with his jokes, and now he’s hoping to do so with his rhymes. The superstar comedian has signed a deal with Motown Records to release an album under his rapper alter-ego, Chocolate Droppa, this fall. The 37-year-old performer, who is from Philadelphia, has had back-to-back success in recent years with a sold-out comedy tour and roles in movies like “Ride Along,” ”Central Intelligence” and “Think Like a Man