Windows dtest 2.2: rebuild_test.py:TestRebuild.simple_rebuild_test

concurrent rebuild should not be allowed
File "C:\tools\python2\lib\unittest\case.py", line 329, in run
    testMethod()
  File "D:\jenkins\workspace\cassandra-2.2_dtest_win32\cassandra-dtest\rebuild_test.py", line 87, in simple_rebuild_test
    self.fail("concurrent rebuild should not be allowed")
  File "C:\tools\python2\lib\unittest\case.py", line 410, in fail
    raise self.failureException(msg)
'concurrent rebuild should not be allowed\n-------------------- >> begin captured logging << --------------------\ndtest: DEBUG: cluster ccm directory: d:\\temp\\dtest-rltloj\n--------------------- >> end captured logging << ---------------------'