Ignore book_corp

[justinlittman]

          {
            "seq_no": 6,
            "role": "book_corp",
            "full_name": "IEEE COMPUTER SOCIETY",
            "display_name": "IEEE COMPUTER SOCIETY",
            "wos_standard": "IEEE COMPUTER SOCIETY"
          }

Also, should check data to find all types to roles to determine which to ignore / handle.