Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/unittest/case.py", line 331, in run
    testMethod()
  File "/private/var/lib/jenkins/workspace/elastic+beats+pull-request+multijob-darwin/beat/libbeat/label/macosx/src/github.com/elastic/beats/libbeat/tests/system/test_base.py", line 206, in test_persistent_uuid
    meta1 = run()
  File "/private/var/lib/jenkins/workspace/elastic+beats+pull-request+multijob-darwin/beat/libbeat/label/macosx/src/github.com/elastic/beats/libbeat/tests/system/test_base.py", line 188, in run
    max_timeout=2)
  File "/private/var/lib/jenkins/workspace/elastic+beats+pull-request+multijob-darwin/beat/libbeat/label/macosx/src/github.com/elastic/beats/libbeat/tests/system/beat/beat.py", line 337, in wait_until
    "Waited {} seconds.".format(max_timeout))
TimeoutError: Timeout waiting for 'cond' to be true. Waited 2 seconds.