Ostf ironic tests failed on clean up node when actually node was deleted before

[Tatyanka]

Steps:
1. Deploy cluster in HA mode with Ironic:
2. Add 1 controller node
3. Add 1 compute node
4. Add 1 ironic node
5. Run OSTF

Actual result :
sanity ostf test for ironic fail without message :
Failed 1 OSTF tests; should fail 0 tests. Names of failed tests:
  - Check that Ironic can operate nodes (error)

This happens because we delete this node before cleanup starts, so when cleanup try to delete this node - it failed with 404 error (and it is unexpected for us), we can delete add.Cleanup() fun in node creation and this may help

2015-12-04 00:49:45 ERROR Check that Ironic can operate nodes (fuel_health.tests.sanity.test_sanity_ironic.IronicSmokeTests.test_002_ironic_node_actions) File "/usr/lib/python2.6/site-packages/unittest2/case.py", line 391, in doCleanups
    function(*args, **kwargs)
  File "/usr/lib/python2.6/site-packages/fuel_health/ironicmanager.py", line 52, in node_delete
    self.ironic_client.node.delete(node.uuid)
  File "/usr/lib/python2.6/site-packages/ironicclient/v1/node.py", line 163, in delete
    return self._delete(self._path(node_id))
  File "/usr/lib/python2.6/site-packages/ironicclient/common/base.py", line 136, in _delete
    self.api.raw_request('DELETE', url)
  File "/usr/lib/python2.6/site-packages/ironicclient/common/http.py", line 215, in raw_request
    return self._http_request(url, method, **kwargs)
  File "/usr/lib/python2.6/site-packages/ironicclient/common/http.py", line 176, in _http_request
    error_json.get('debuginfo'), method, url)
Node 463206ac-76ee-4b0e-ba14-01023748a30e could not be found. (HTTP 404)

here deletion happens (Step 4 delete node):
fuel_health.common.test_mixins: INFO: STEP:4, verify action: 'Deleting node'
ironicclient.common.http: DEBUG: curl -i -X DELETE -H 'X-Auth-Token: gAAAAABWYOMo6ph1vx0YxX8djjpgShbNT4_l2DAWRK09BeO5ejM4vFqoNo3W07vQlnC9ASWi0IR2Kal4UvDjyxBDVdI4stxv6uFKtCHMCz5NrOYi4LGsF9G5rHuQNEs1_L7TxWHwvDRgEbpptcZCbDBeSrTWxoXXxTRrT_u1LJF5-8RK8Y80avo' -H 'Content-Type: application/octet-stream' -H 'User-Agent: python-ironicclient' http://10.109.10.2:6385/v1/nodes/463206ac-76ee-4b0e-ba14-01023748a30e
urllib3.connectionpool: DEBUG: Setting read timeout to None
urllib3.connectionpool: DEBUG: "DELETE http://10.109.10.2:6385/v1/nodes/463206ac-76ee-4b0e-ba14-01023748a30e HTTP/1.1" 204 0
ironicclient.common.http: DEBUG:
HTTP/1.1 204 No Content
x-openstack-ironic-api-version: 1.1
content-length: 0
via: 1.1 apache_api_proxy:6385
server: WSGIServer/0.1 Python/2.7.6
connection: close
x-openstack-ironic-api-maximum-version: 1.14
date: Fri, 04 Dec 2015 00:49:45 GMT
x-openstack-ironic-api-minimum-version: 1.1

ironicclient.common.http: DEBUG: curl -i -X DELETE -H 'X-Auth-Token: gAAAAABWYOMo6ph1vx0YxX8djjpgShbNT4_l2DAWRK09BeO5ejM4vFqoNo3W07vQlnC9ASWi0IR2Kal4UvDjyxBDVdI4stxv6uFKtCHMCz5NrOYi4LGsF9G5rHuQNEs1_L7TxWHwvDRgEbpptcZCbDBeSrTWxoXXxTRrT_u1LJF5-8RK8Y80avo' -H 'Content-Type: application/octet-stream' -H 'User-Agent: python-ironicclient' http://10.109.10.2:6385/v1/nodes/463206ac-76ee-4b0e-ba14-01023748a30e

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/253481

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/253481
Committed: https://git.openstack.org/cgit/openstack/fuel-ostf/commit/?id=48883c8f1b2c53989fad74137f0bde392098b0f2
Submitter: Jenkins
Branch: master

commit 48883c8f1b2c53989fad74137f0bde392098b0f2
Author: vsaienko <email address hidden>
Date: Fri Dec 4 15:19:58 2015 +0200

    Catch correct ironic exception

    Catch exception from ironicclient instead of
    fuel_health exceptions

    Change-Id: I718638039b9ac2e0b93e93872085d3e083b3a6db
    Closes-Bug: #1522740