LU-6012 scrub: NOT miss to auto detect inconsistent OI mapping

When full scrub is triggered automatically, its flags should
be set as SF_INCONSISTENT.

For lookup case, we should check whether current OI mapping is
consistent or not, even if the current OI scrub flags is NOT
SF_INCONSISTENT.

Signed-off-by: Fan Yong <fan.yong@intel.com>
Change-Id: I99ea077ae79fcdfedd7bb16c2a664714e0ea5ea3
Reviewed-on: http://review.whamcloud.com/13020
Tested-by: Jenkins
Tested-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
LU-5986 test: Ensure correct start for conf-sanity/84

For review-zfs:
1) test 79 fails to reformat nodes
2) test 80 fails silently
3) test 84 chokes

Fix test 79 to reformat at end and fix 80 die when it should.

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Change-Id: I42c635fffd89eda9ccd6f3f9d739ff8ac75afcf6
Reviewed-on: http://review.whamcloud.com/13016
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>