LU-14160 tests: fix fsx logdump to fit in 80 chars

LU-14160 tests: fix fsx logdump to fit in 80 chars

Fix fsx logdump fallocate/truncate lines to fit within 80 columns.
Remove spurious leading 0 for every operation length.

Test-Parameters: trivial testlist=sanityn env=ONLY=16
Fixes: cb037f305c64 ("LU-14160 fallocate: Add punch mode to fallocate")
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I93460b62be8611926e620241232d886dee3ebbe5
Reviewed-on: https://review.whamcloud.com/44510
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Mike Pershin <mpershin@whamcloud.com>
Reviewed-by: Li Dongyang <dongyangli@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>