[databug] world_oecd_pisa__student

Identificar problemas no teste de pais com o diretório br_bd_diretorios_mundo.pais para o conjunto world_oecd_pisa tabela student

Start by locating the country test for br_bd_diretorios_mundo.pais and the world_oecd_pisa student table. Reproduce the reported problem and compare the table's country values with the directory; done means the identified test issue is corrected and the relevant data test passes.

Written by the indexing model from the issue text.