test: create /tmp/cephtest/mnt.{id}

The workunit task assumes that a mount exists
at /tmp/cephtest/mnt.{id}
This patch creates the path if it doesn't
exist, enabling workunits to run in the absense
of kclient or ceph-fuse tasks.

Signed-off-by: Joe Buck <jbbuck@gmail.com>
test: enable localized-reads flag for ceph-fuse

Changes to the ceph-fuse task to allow the enabling
of --localized-reads.

Signed-off-by: Joe Buck <jbbuck@gmail.com>
Making suggested changes.

Signed-off-by: Joe Buck <jbbuck@gmail.com>
Merge branch 'wip-buck-localized-reads' of https://github.com/ceph/teuthology into wip-buck-localized-reads