LU-7812 tests: print more stats for sanity 120e failure

LU-7812 tests: print more stats for sanity 120e failure

Print more info for sanity.sh test_120e failures to help debug
intermittent failures of this test.

Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: Ib4288ce9440a787cb34a9b276858d720d48a6256
Reviewed-on: http://review.whamcloud.com/18826
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>