LU-1688 test: fix the problem in test_58 of recovery_small

in test_58 of recovery_small, the 'df' command could trigger
the eviction caused by the above 'drop_bl_callback', then
the fail of 'df' could be not thought as the fail of th test,

Signed-off-by: Hongchao Zhang <hongchao.zhang@whamcloud.com>
Change-Id: I226a3d4772d033182ded28caacbecdc44c7af8c4
Reviewed-on: http://review.whamcloud.com/3506
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Jay J Lan <jay.j.lan@nasa.gov>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
LU-1280 ldiskfs: remove LASSERTF from ext3_ext_new_extent_cb()

The LASSERTF() in ext3_ext_new_extent_cb() was injected for
debugging purpose to make sure the race really happened but
was forgotten to be removed from the original patch in
http://review.whamcloud.com/1618 .

Signed-off-by: Yu Jian <yujian@whamcloud.com>
Change-Id: I978b8ab88cc4413c7ac00db838f7578f8011b192
Reviewed-on: http://review.whamcloud.com/2452
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Bobi Jam <bobijam@whamcloud.com>
LU-1280 ldiskfs: remove EXT_ASSERT from ext3_ext_new_extent_cb()

The EXT_ASSERT() in ext3_ext_new_extent_cb() is invalid since
new locking is introduced in ext4_ext_walk_space().

Signed-off-by: Yu Jian <yujian@whamcloud.com>
Change-Id: I8de3ad4004c304a45be14347df50bf066d8f4caa
Reviewed-on: http://review.whamcloud.com/2827
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>