NuCivic/nucivic-internal#35 Fix wrong parameter id in package_show metho...

NuCivic/nucivic-internal#35

### Acepting test
Run:
```bash
drush fr open_data_schema_map_dkan
drush cc all
```
Then if you go to /api/3/action/package_show?id=us-national-foreclosure-statistics-january-2012 you should see the package listed.