thread 7 swarm tests has failed status on 6.1 version because of wrong test

Detailed bug description:
thread 7 swarm tests has failed status on 6.1 release with exception:
https://paste.mirantis.net/show/2010/

This problem reproduced because method:
https://github.com/openstack/fuel-qa/blob/master/fuelweb_test/models/collector_client.py#L45
returned json, such as:
https://paste.mirantis.net/show/2006/
but in method:
https://github.com/openstack/fuel-qa/blob/master/fuelweb_test/models/collector_client.py#L66
we wait list.

>>> [actions['id'] for actions in collector.get_action_logs(uuid)]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: string indices must be integers
>>> [actions['id'] for actions in collector.get_action_logs(uuid)['objs']]
[305032, 305033, 305034, 305035, 305204, 305205, 305206, 305207, 305208, 305209, 305210, 305211, 305212, 305213, 305526, 305527, 305528, 305529]

Steps to reproduce:
1. Run thread 7 test
2. Wait
Expected results:
Test passed
Actual result:
test failed:
https://patching-ci.infra.mirantis.net/view/All/job/6.1.system_test.centos.thread_7/18/console
Reproducibility:
100%
Workaround:
nothing