THE dinner hosted by the Bakrie family at the Ballroom of the Four Seasons Hotel last April was a happy affair. Every single member of the family, from Roosniyah (widow of Achmad Bakrie, founder of the Bakrie Group) and her children Aburizal, Roosmania, Nirwan Dermawan and Indra Usmansyah and others, attended the great event. The occasion was their visitor and guest of honor, Nathaniel Rothschild, the new partner of Vallar Plc., who is none oth