LU-11373 tests: increase debug limit sanity 60b

LU-11373 tests: increase debug limit sanity 60b

We've seen cases where the number of debug messages
on the MDS exceed the line number limit of 100 in
sanity test 60b. Since the line limit is an approximation,
increase this limit to 120 lines.

Test-Parameters: trivial
Test-Parameters: mdtfilesystemtype=zfs ostfilesystemtype=zfs testlist=sanity
Test-Parameters: mdscount=2 mdtcount=2 mdtfilesystemtype=zfs ostfilesystemtype=zfs testlist=sanity
Test-Parameters: mdscount=2 mdtcount=2 mdtfilesystemtype=ldiskfs ostfilesystemtype=ldiskfs testlist=sanity

Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: Ibf302893f468957983c11374b8fa829802ff136c
Reviewed-on: https://review.whamcloud.com/33474
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>