LU-13998 tests: sanityn test_104 incorrect MDT times shown

LU-13998 tests: sanityn test_104 incorrect MDT times shown

sanityn test_104 prints STAT times instead of MDT times.
Fix it so it prints both for comparison.

Test-Parameters: trivial testlist=sanityn
Signed-off-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Change-Id: I4ae0c1fe704c02c3463043830783cd1d6cd46b98
Reviewed-on: https://review.whamcloud.com/40061
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Nunez <jnunez@whamcloud.com>