"Check that Ironic can operate nodes" OSTF test passes but raises error to OSTF log

 Test failed on step 2:

OSTF test "Check that Ironic can operate nodes" passed successfully but generated error

OSTF Healthcheck output:
Error message:
2016-09-12 18:17:32 ERROR (ironicmanager) Failed on node delete b222670c-b643-457d-adce-a45d4abdd03f
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/fuel_health/ironicmanager.py", line 52, in node_delete
    self.ironic_client.node.delete(node.uuid)
  File "/usr/lib/python2.7/site-packages/ironicclient/v1/node.py", line 212, in delete
    return self._delete(resource_id=node_id)
  File "/usr/lib/python2.7/site-packages/ironicclient/common/base.py", line 181, in _delete
    self.api.raw_request('DELETE', self._path(resource_id))
  File "/usr/lib/python2.7/site-packages/ironicclient/common/http.py", line 414, in raw_request
    return self._http_request(url, method, **kwargs)
  File "/usr/lib/python2.7/site-packages/ironicclient/common/http.py", line 190, in wrapper
    return func(self, url, method, **kwargs)
  File "/usr/lib/python2.7/site-packages/ironicclient/common/http.py", line 372, in _http_request
    error_json.get('debuginfo'), method, url)
NotFound: Node b222670c-b643-457d-adce-a45d4abdd03f could not be found. (HTTP 404)

Cluster settings:
3 nodes "Controller + Ironic"
1 node "Compute"
1 node "Cinder"

Environment:
# shotgun2 short-report
cat /etc/fuel_build_id:
 660
cat /etc/fuel_build_number:
 660
cat /etc/fuel_release:
 10.0
cat /etc/fuel_openstack_version:
 newton-10.0
rpm -qa | egrep 'fuel|astute|network-checker|nailgun|packetary|shotgun':
 fuel-misc-10.0.0-1.mos8800.noarch
 fuel-library10.0-10.0.0-1.mos8800.noarch
 fuel-10.0.0-1.mos6375.noarch
 fuel-openstack-metadata-10.0.0-1.mos8949.noarch
 fuel-notify-10.0.0-1.mos8800.noarch
 fuel-setup-10.0.0-1.mos6375.noarch
 nailgun-mcagents-10.0.0-1.mos783.noarch
 rubygem-astute-10.0.0-1.mos783.noarch
 python-fuelclient-10.0.0-1.mos382.noarch
 fuelmenu-10.0.0-1.mos293.noarch
 fuel-bootstrap-cli-10.0.0-1.mos324.noarch
 fuel-utils-10.0.0-1.mos8800.noarch
 fuel-nailgun-10.0.0-1.mos8949.noarch
 fuel-migrate-10.0.0-1.mos8800.noarch
 fuel-ostf-10.0.0-1.mos955.noarch
 fuel-release-10.0.0-1.mos6375.noarch
 shotgun-10.0.0-1.mos93.noarch
 network-checker-10.0.0-1.mos78.x86_64
 fuel-agent-10.0.0-1.mos324.noarch
 fuel-ui-10.0.0-1.mos2926.noarch