LU-1538 tests: run sanity-lfsck instead of lfsck

LU-1538 tests: run sanity-lfsck instead of lfsck

Run sanity-lfsck in the default acceptance-small test list instead of
the old lfsck test, which will be deprecated and removed in the 2.6
release.

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: I5903d854dc16d3ed8bca1139355a73230e500c1e
Reviewed-on: http://review.whamcloud.com/7952
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>