queueStableUnderStress tests failing on windows

[jsvd]

CI job failed: https://logstash-ci.elastic.co/job/elastic+logstash+6.x+multijob-windows-compatibility/12/console

13:49:16 org.logstash.ackedqueue.QueueTest > queueStableUnderStressLowCapacity FAILED
13:49:16     java.lang.IllegalStateException: java.nio.file.AccessDeniedException: C:\Users\jenkins.LOGSTASH-CI-WIN\AppData\Local\Temp\junit1468481081486511579\data\checkpoint.head.tmp -> C:\Users\jenkins.LOGSTASH-CI-WIN\AppData\Local\Temp\junit1468481081486511579\data\checkpoint.head
13:49:16         at org.logstash.ackedqueue.QueueTest.stableUnderStress(QueueTest.java:867)
13:49:16         at org.logstash.ackedqueue.QueueTest.queueStableUnderStressLowCapacity(QueueTest.java:634)
13:49:16 
13:49:16         Caused by:
13:49:16         java.nio.file.AccessDeniedException: C:\Users\jenkins.LOGSTASH-CI-WIN\AppData\Local\Temp\junit1468481081486511579\data\checkpoint.head.tmp -> C:\Users\jenkins.LOGSTASH-CI-WIN\AppData\Local\Temp\junit1468481081486511579\data\checkpoint.head
13:49:16             at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:83)
13:49:16             at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
13:49:16             at sun.nio.fs.WindowsFileCopy.move(WindowsFileCopy.java:301)
13:49:16             at sun.nio.fs.WindowsFileSystemProvider.move(WindowsFileSystemProvider.java:287)
13:49:16             at java.nio.file.Files.move(Files.java:1395)
13:49:16             at org.logstash.ackedqueue.io.FileCheckpointIO.write(FileCheckpointIO.java:70)
13:49:16             at org.logstash.ackedqueue.Page.forceCheckpoint(Page.java:205)
13:49:16             at org.logstash.ackedqueue.Queue.newCheckpointedHeadpage(Queue.java:316)
13:49:16             at org.logstash.ackedqueue.Queue.write(Queue.java:360)
13:49:16             at org.logstash.ackedqueue.QueueTest.stableUnderStress(QueueTest.java:865)
13:49:16             ... 1 more

and

13:49:25 org.logstash.ackedqueue.QueueTest > queueStableUnderStressHugeCapacity FAILED
13:49:25     java.lang.IllegalStateException: java.nio.file.AccessDeniedException: C:\Users\jenkins.LOGSTASH-CI-WIN\AppData\Local\Temp\junit770406794193996211\data\checkpoint.head.tmp -> C:\Users\jenkins.LOGSTASH-CI-WIN\AppData\Local\Temp\junit770406794193996211\data\checkpoint.head
13:49:25         at org.logstash.ackedqueue.QueueTest.stableUnderStress(QueueTest.java:867)
13:49:25         at org.logstash.ackedqueue.QueueTest.queueStableUnderStressHugeCapacity(QueueTest.java:629)
13:49:25 
13:49:25         Caused by:
13:49:25         java.nio.file.AccessDeniedException: C:\Users\jenkins.LOGSTASH-CI-WIN\AppData\Local\Temp\junit770406794193996211\data\checkpoint.head.tmp -> C:\Users\jenkins.LOGSTASH-CI-WIN\AppData\Local\Temp\junit770406794193996211\data\checkpoint.head
13:49:25             at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:83)
13:49:25             at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
13:49:25             at sun.nio.fs.WindowsFileCopy.move(WindowsFileCopy.java:301)
13:49:25             at sun.nio.fs.WindowsFileSystemProvider.move(WindowsFileSystemProvider.java:287)
13:49:25             at java.nio.file.Files.move(Files.java:1395)
13:49:25             at org.logstash.ackedqueue.io.FileCheckpointIO.write(FileCheckpointIO.java:70)
13:49:25             at org.logstash.ackedqueue.Page.forceCheckpoint(Page.java:205)
13:49:25             at org.logstash.ackedqueue.Page.headPageCheckpoint(Page.java:170)
13:49:25             at org.logstash.ackedqueue.Page.checkpoint(Page.java:159)
13:49:25             at org.logstash.ackedqueue.Page.write(Page.java:80)
13:49:25             at org.logstash.ackedqueue.Queue.write(Queue.java:364)
13:49:25             at org.logstash.ackedqueue.QueueTest.stableUnderStress(QueueTest.java:865)
13:49:25             ... 1 more