Reorg of working directory and log file stuff for start/swap/end

experiment. Here is mail to tbops:

* Moved the working directory for experiment setup/swap/end to a new
  directory located on boss instead of over NFS to /proj/$pid/$eid. This
  new location is /usr/testbed/expwork/$pid/$eid.

* Changed the name of the directories we create in /usr/testbed/expinfo to
  $pid-$eid.$index where $index is a new autoincrement field in the DB
  table. I really hated the names that were created before.

* Changed where logs are written from /tmp to the new location in
  /usr/testbed/expwork/$pid/$eid.

Okay, why.

* We no longer operate on NFS mounted directories that might hang. Its
  easier to catch the situation where a copy of the log file over at the
  end of experiment creation fails cause of an NFS problem.

* We no longer have user writable files that are inputs to other parts of
  the system (like top and ptop files).  Not that a user would be bad, but
  it closes a hole.

* We no longer copy user writable files from /proj to boss where we might
  fill up an important filesystem cause the user put a .ndz file in the the
  working directory. Not that a user would be bad, but it closes a hole.

* Its easier to save all the log files this way, for each swap in and
  out.

* Removing a directory over NFS is a royal irritant when someone is CD'ed
  into that directory or looking at a file on the other side (the astute
  observer will peg this as the reason I went down this idiotic path in the
  first place!).

* About 6 other reasons that I can no longer remember. Seriously, I really
  had more reasons I can no longer remember! :-)