can't detect pk in some DBMS #31

In some DBMS, DatabaseMetaData#getPrimaryKeys returns COLUMN_NAME in lowercase.
(I tried sqlite3)

I think you should add String#toUpperCase when you get primarykey's column name at org.assertj.db.type.Table#collectPrimaryKeyName

     while (resultSet.next()) {
        String columnName = resultSet.getString("COLUMN_NAME").toUpperCase();
        if (getColumnsNameList().indexOf(columnName) != -1) {
          pksNameList.add(columnName);
        }
      }

Thank you.