Jenkins test-unit jobs is hitting the following assertion in test_timestamp07:
http://build.wiredtiger.com:8080/job/wiredtiger-test-unit/6197/console
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FAIL: test_timestamp07.test_timestamp07.test_timestamp07(file.nolog.100keys) (subunit.RemotedTestCase)
test_timestamp07.test_timestamp07.test_timestamp07(file.nolog.100keys)
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_StringException: Traceback (most recent call last):
  File "/mnt/data0/jenkins/workspace/wiredtiger-test-unit/test/suite/test_timestamp07.py", line 231, in test_timestamp07
    self.check_eviction()
  File "/mnt/data0/jenkins/workspace/wiredtiger-test-unit/test/suite/test_timestamp07.py", line 156, in check_eviction
    self.assertTrue(not did_eviction or self.evicts)
  File "/usr/lib64/python2.7/unittest/case.py", line 462, in assertTrue
    raise self.failureException(msg)
AssertionError: False is not true
