[OSTF][system_test] Sahara test failed with error in ostf that net04_ext pool not found

[Tatyanka]

183 iso
deploy sahara test fails on ostf with error:
v1.0/75bf355b94fa4d5fb4cb82903d881131/cluster-templates HTTP/1.1" 400 156
fuel_health.common.test_mixins: DEBUG: Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/fuel_health/common/test_mixins.py", line 186, in verify
    result = func(*args, **kwargs)
  File "/usr/lib/python2.6/site-packages/fuel_health/savanna.py", line 521, in _create_tiny_cluster_template
    anti_affinity=[]
  File "/usr/lib/python2.6/site-packages/fuel_health/savanna.py", line 123, in _create_cluster_template_and_get_id
    node_groups, anti_affinity
  File "/usr/lib/python2.6/site-packages/saharaclient/api/cluster_templates.py", line 50, in create
    return self._create('/cluster-templates', data, 'cluster_template')
  File "/usr/lib/python2.6/site-packages/saharaclient/api/base.py", line 79, in _create
    self._raise_api_exception(resp)
  File "/usr/lib/python2.6/site-packages/saharaclient/api/base.py", line 135, in _raise_api_exception
    error_message=error_data.get("error_message"))
APIException: Floating IP pool net04_ext for node group 'ostf-test-master-node-jt-nn' not found