A Phase I, Open-Label, Multicentre Study to Assess the Safety, Tolerability, PK and Preliminary Anti-tumor Activity when given as a monotherapy of Tremelimumab or Tremelimumab in combination with MEDI4736 in Japanese Patients with Advanced Solid Malignancies, and when given as a monotherapy of tremelimumab in Second- or Third-line Treatment of Japanese Subjects with Unresectable Pleural or Peritoneal Malignant Mesothelioma