LU-282 tests: remove extra logging from sanity 27

LU-282 tests: remove extra logging from sanity 27

Remove extra logging from sanity.sh test_27b to avoid confusing
autotest log parsing.

Replace some uses of $SETSTRIPE and $GETSTRIPE with $LFS in these
functions since this was only needed during the ancient transition
from the standalone "lstripe" binary.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: I270d2f75cd803bede5776117c9d5aaaa5b3ebbe5
Reviewed-on: https://review.whamcloud.com/27322
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Steve Guminski <stephenx.guminski@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>