Some errors

Trying to "paster qa update" a dataset:

ckanext-qa/ckanext/qa/commands.py", line 129, in _package_list
(id, url, response.error))
AttributeError: 'Response' object has no attribute 'error'

Suppose you fix this, then you'll get an error trying to get the dataset via API because I think you use a POST to get the dataset, and the API says you get it with an ?id=id-of-the-dataset appended in the URL, I guess only vía GET.

The reported failure is in ckanext-qa/ckanext/qa/commands.py at line 129; first reproduce it with `paster qa update` against a dataset. Inspect the response handling and dataset API request, then verify the command no longer raises AttributeError and retrieves the dataset using the API's expected GET request with the dataset id.

Written by the indexing model from the issue text.