Fix concurrentDeleteTest failures
Description
https://amplab.cs.berkeley.edu/jenkins/view/Alluxio/job/Alluxio-Master/2612/PROFILE_OPTS=-Phadoop-2.2%20-PhdfsTest,label=centos/
https://amplab.cs.berkeley.edu/jenkins/view/Alluxio/job/Alluxio-Master/2622/PROFILE_OPTS=-Phadoop-1%20-PhdfsTest,label=centos/
https://amplab.cs.berkeley.edu/jenkins/view/Alluxio/job/Alluxio-Master/2608/PROFILE_OPTS=-Phadoop-1%20-PhdfsTest,label=centos/
https://amplab.cs.berkeley.edu/jenkins/view/Alluxio/job/Alluxio-Master/2607/PROFILE_OPTS=-Pdeveloper,label=centos/
Environment
None
Assignee
Gene Pang
Reporter
Andrew Audibert
Labels
Components
Affects versions
Priority
CriticalConfigure