[OSTF] Failure ceilometer test test_create_sample

{"build_id": "2014-09-11_01-04-40", "ostf_sha": "1de6ed1c0b72f6687ffb4bebc2c939b135a88e34", "build_number": "3", "auth_required": true, "api": "1.0", "nailgun_sha": "720e83bca37561fbc0452ad4e99f1f8cfe8e40cf", "production": "docker", "fuelmain_sha": "d899675a5a393625f8166b29099d26f45d527035", "astute_sha": "b622d9b36dbdd1e03b282b9ee5b7435ba649e711", "feature_groups": ["experimental"], "release": "5.1", "release_versions": {"2014.1.1-5.1": {"VERSION": {"build_id": "2014-09-11_01-04-40", "ostf_sha": "1de6ed1c0b72f6687ffb4bebc2c939b135a88e34", "build_number": "3", "api": "1.0", "nailgun_sha": "720e83bca37561fbc0452ad4e99f1f8cfe8e40cf", "production": "docker", "fuelmain_sha": "d899675a5a393625f8166b29099d26f45d527035", "astute_sha": "b622d9b36dbdd1e03b282b9ee5b7435ba649e711", "feature_groups": ["experimental"], "release": "5.1", "fuellib_sha": "6fc7ac9041894aa76b2e18d385149166e34f7b23"}}}, "fuellib_sha": "6fc7ac9041894aa76b2e18d385149166e34f7b23"}

Ceiloemter test fuel_health.tests.platform_tests.test_ceilometer.CeilometerApiPlatformTests.test_create_sample
fas filure with trace:
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/unittest2/case.py", line 340, in run
    testMethod()
  File "/usr/lib/python2.6/site-packages/fuel_health/tests/platform_tests/test_ceilometer.py", line 155, in test_create_sample
    len(list_before_create_sample))
  File "/usr/lib/python2.6/site-packages/fuel_health/common/test_mixins.py", line 192, in verify
    " Please refer to OpenStack logs for more details.")
  File "/usr/lib/python2.6/site-packages/unittest2/case.py", line 415, in fail
    raise self.failureException(msg)
AssertionError: Step 5 failed: 1 not greater than 1 Please refer to OpenStack logs for more details.

because sometimes runs check for create sample before create sample.