ceph/teuthology — pull request #336 by gregsfortytwo (2014-09-24 21:16:50+00:00)
Title: enable lsof when unmounting nfs clients

This should help us track down anything still in use by an NFS export after the NFS users unmount, which we believe has been causing CephFS unmount failures in testing.

Because the lsof interface is strange, use the verbose flag so we get
some output even if there is no use, and ignore errors because it will
return 1 if there's no filesystem use.