NEX-3363 Test suites don't cleanup after themselves properly.
Reviewed by: Josef 'Jeff' Sipek <josef.sipek@nexenta.com>
4206 history_003_pos relies on exact size of history log and entries
4207 history_008_pos depends on obsolete internal history log message
4208 Typo in zfs_main.c: "posxiuser"
4209 Populate zfstest with the remainder of the STF tests
Reviewed by: Sonu Pillai <sonu.pillai@delphix.com>
Reviewed by: Will Guyette <will.guyette@delphix.com>
Reviewed by: Eric Diven <eric.diven@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

*** 35,44 ****
--- 35,45 ----
  verify_runnable "global"
  
  df -F zfs -h | grep "$TESTFS " >/dev/null
  [[ $? == 0 ]] && log_must zfs umount -f $TESTDIR
  destroy_pool $TESTPOOL
+ [[ -e $TESTDIR ]] && log_must rm -rf $TESTDIR
  
  # recreate and destroy a zpool over the disks to restore the partitions to
  # normal
  if [[ -n $SINGLE_DISK ]]; then
          log_must cleanup_devices $MIRROR_PRIMARY