Code review comment for lp://staging/~brendan-donegan/hwcert-tools/batch_query_fix

Maybe I'm doing something wrong, but:

$ certification_reports/certification_blockers.py -l montreal-lab bugs 12.04.2 roadmr [my secret key] >/tmp/pla.html
Traceback (most recent call last):
  File "certification_reports/certification_blockers.py", line 332, in <module>
    sys.exit(main())
  File "certification_reports/certification_blockers.py", line 324, in main
    api, launchpad, args.enabled)
  File "certification_reports/certification_blockers.py", line 212, in get_blocking_bugs
    certs = get_certificates(url, release, credentials, api, enabled)
  File "certification_reports/certification_blockers.py", line 95, in get_certificates
    return api.batch_query(request_url, params=failed_certs_params)
  File "/media/bulk/src/hwcert-tools/bzr/reporting-tools/certification_reports/api_utils.py", line 33, in batch_query
    args[0] = self.instance_uri + next_query
TypeError: 'tuple' object does not support item assignment