Move Autotest to /usr/local/autotest and fix hard-coded autodir paths in client tests.

client/site_tests/logging_LogVolume/stateful_whitelist.txt

 # This is a list of regular expressions such that every file system
 # entry on the stateful partition must have a full path that exactly
 # matches at least one.  That includes directories, regular files, and
 # special files.
 
 # Please make every regular expression as specific as possible
 # to enable everyone to know when new file is being stored on
 # the stateful partition.  Every file system entry on the stateful
 # partition is a liability that can result in a Chromium-OS device
 # not being able to be logged into.  Please do your part in
@@ skipping 23 matching lines @@
 /home/\.shadow/skel/\.bashrc
 /home/\.shadow/skel/logs
 /home/\.shadow/skel/\.bash_logout
 /home/\.shadow/skel/\.bash_profile
 /home/\.shadow/salt
 /home/\.shadow/[a-z0-9]+
 /home/\.shadow/[a-z0-9]+/master\.0\.salt
 /home/\.shadow/[a-z0-9]+/master\.0
 /home/\.shadow/[a-z0-9]+/vault
 /home/\.shadow/[a-z0-9]+/vault/.*
-# Autotest is running right now, so allow anything in there.
-/home/autotest
-/home/autotest/.*
 /home/chronos
 /home/chronos/\.Google
 /home/chronos/\.Google/Google Talk Plugin
 /home/chronos/\.Google/Google Talk Plugin/options
 /home/chronos/\.Xauthority
 /home/chronos/\.adobe
 /home/chronos/\.adobe/Flash_Player
 /home/chronos/\.adobe/Flash_Player/AssetCache
 /home/chronos/\.adobe/Flash_Player/AssetCache/.*
 # bash history should only exist for development users
@@ skipping 192 matching lines @@
 /var/spool
 /var/spool/mail
 # Crash dumps involving processes run as other than "chronos" user.
 /var/spool/crash
 /var/spool/crash/.*\.(core|dmp)
 /var/spool/cron
 /var/spool/cron/crontabs
 /var/spool/cron/lastrun
 /var/spool/cron/lastrun/cron.(daily|hourly|monthly|weekly)
 /var/tmp