LinuxFilesystemIsolatorTest.ROOT_PersistentVolumeWithoutRootFilesystem fails on CentOS 7.1

[ RUN      ] LinuxFilesystemIsolatorTest.ROOT_PersistentVolumeWithoutRootFilesystem
../../src/tests/containerizer/filesystem_isolator_tests.cpp:498: Failure
(wait).failure(): Failed to clean up an isolator when destroying container '366b6d37-b326-4ed1-8a5f-43d483dbbace' :Failed to unmount volume '/tmp/LinuxFilesystemIsolatorTest_ROOT_PersistentVolumeWithoutRootFilesystem_KXgvoH/sandbox/volume': Failed to unmount '/tmp/LinuxFilesystemIsolatorTest_ROOT_PersistentVolumeWithoutRootFilesystem_KXgvoH/sandbox/volume': Invalid argument
../../src/tests/utils.cpp:75: Failure
os::rmdir(sandbox.get()): Device or resource busy
[  FAILED  ] LinuxFilesystemIsolatorTest.ROOT_PersistentVolumeWithoutRootFilesystem (1943 ms)
[----------] 1 test from LinuxFilesystemIsolatorTest (1943 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (1951 ms total)
[  PASSED  ] 0 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] LinuxFilesystemIsolatorTest.ROOT_PersistentVolumeWithoutRootFilesystem