“Mahalia,” the Lifetime biopic produced by Robin Roberts and starring “Orange is the New Black’s” Danielle Brooks, tells the story of gospel and jazz singer Mahalia Jackson — but it doesn’t quite cover everything.Throughout her life, Jackson went from a “fish and bread singer” — e.g., traveling the South singing gospel music for little pay to make ends meet — to performing in front of sold-out, racially integrated audiences at Carnegie Hall and at former President John F.