DIVORCES were granted this week in County Court Branch 3 to Janet R. Roberts of Burlington from Keith M. Roberts of Burlington; to Dorothy M. Kwai-lek of 1120 Somerset Drive from James Kwallek of 1116 College Ave.; to Dorothy M. Raab of 2049 Phillips Ave. from Emil Raab of the Eagle Hotel, 1119 16th St.; to Patricia R. Anderson of 1613 September Drive from James J. Anderson of 5000Graceland Blvd.: to Richard