Raised exception in iter_job_results() prevents API errors from returning

[sserrata]

Describe the bug

The following line in iter_job_results() method prevents API errors from being properly returned:

https://github.com/PaloAltoNetworks/pan-cortex-data-lake-python/blob/master/pan_cortex_data_lake/query.py#L239

Expected behavior

Like successful responses, failed/error responses from the API should be passed to the client.

Current behavior

In iter_job_results(), failed API responses are not returned to the client due to the raised exception.

Possible solution

Refrain from raising an exception for non HTTP status 200 responses.

Steps to reproduce

Screenshots

Context

Your Environment

• Version used: alpha11
• Environment name and version (e.g. Chrome 59, node.js 5.4, python 3.7.3): python 3.7.7
• Operating System and version (desktop or mobile): Mac OSX
• Link to your project: