Revert "LU-3264 tests: import ZFS pool which has file-based vdev"

Unfortunately zfs testing took a nosedive after this commit was included.

This reverts commit 3dffd5b5c4c95f29e718cab63e8ef1c7da0c1f8b.
Revert "LU-3264 tests: support failover testing with ZFS"

Unfortunately zfs testing took a nosedive after this commit was included.

This reverts commit fb8bf83fabd45730345b3eb8c5289334174462be.
LU-3350 tests: allow test-error for lfsck/scrub speed

Affected by the test environment and CPU schedule randomness,
especailly test in virtal machine, it is not easy to control
the lfsck/scrub speed accurtely. So we have to consider more
test-error.

Test-Parameters: testlist=sanity-scrub,sanity-lfsck

Signed-off-by: Fan Yong <fan.yong@intel.com>
Change-Id: I794d26d2bfa73d7000e77790cc7a2c8203f7db06
Reviewed-on: http://review.whamcloud.com/6374
Tested-by: Hudson
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
LU-3369 scrub: skip test_1a for old 2.x (x <= 3) release

Lustre-2.3 or older does not support initial OI scrub,
so skip related sanity-scrub test_1a.

Test-Parameters: testlist=sanity-scrub
Signed-off-by: Fan Yong <fan.yong@intel.com>
Change-Id: I17752be675bdda76588c55c38c20c37a009eff00
Reviewed-on: http://review.whamcloud.com/6417
Tested-by: Hudson
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Bobi Jam <bobijam@gmail.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
LU-3359 osc: fixed a typo in osc_cache_truncate_start

Dump osc_extent waiting instead of ext in case error occurred.

Signed-off-by: Jinshan Xiong <jinshan.xiong@intel.com>
Change-Id: I7df560a0aa83ddc6010cad1c51fa2013e941ae60
Reviewed-on: http://review.whamcloud.com/6402
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>