Append '/' to the end of the log directory path
drop obsolete PYTHONPATH settings

These are left over from when we were extracting a tarball in the test dir.

Signed-off-by: Sage Weil <sage@inktank.com>
Merge pull request #71 from ceph/wip-no-pythonpath

drop obsolete PYTHONPATH settings
Merge git://github.com/ceph/teuthology