[tempest-lib] REST client can not parse 'list' in json response in any case

[Victor Ryzhenkin]

Using master devstack.

If response json contains only 'list' type object, REST client _parse_resp method will raise an exception
'AttributeError: 'list' object has no attribute 'keys''

The example of failed job here: http://logs.openstack.org/84/274284/3/check/gate-tempest-dsvm-murano-api/fcf8a33/testr_results.html.gz

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/274356

[OpenStack Infra (hudson-openstack)]

Change abandoned by Victor Ryzhenkin (<email address hidden>) on branch: master
Review: https://review.openstack.org/274356
Reason: Will reupload the change to corresponding repo.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/461124

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/461124
Committed: https://git.openstack.org/cgit/openstack/tempest/commit/?id=69a8edc1ac7eb9260094f972fe1677205c9a8f0e
Submitter: Jenkins
Branch: master

commit 69a8edc1ac7eb9260094f972fe1677205c9a8f0e
Author: Ken'ichi Ohmichi <email address hidden>
Date: Fri Apr 28 11:41:20 2017 -0700

    Prevent error in _parse_resp when nullable list

    - Add if contiditon to check, that body object hasattr 'keys'
    - Add unit test for this case

    NOTE: The original patch is Ifd063ed2329ec14c123a128b9520babb54ece69c
          and this patch moves it to Tempest from deprecated tempest-lib.
          In addition, this patch moves the test path because the path was
          not match to the corresponding module.
          One more thing is that this issue happened on Murano side and
          they needed to have some workaround on their side. It would be
          nice to fix this root issue on Tempest side.

    Co-Authored-By: Victor Ryzhenkin <email address hidden>
    Closes-Bug: #1539927
    Change-Id: I46cee5f3910ec9dfe383c6466f711e4a9554bb60

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/tempest 16.1.0 release.