LU-7627 tests: parse filefrag output correctly

Tests 130[bcde] failed because numbers parsed with leading zeros
treated as octal number so there is error value too great for base
when parsed lun id greater than 0007 value, Removing leading spaces
in parsed number and adding prefix 0x in condition solved the issue.
sanity tests 130[bcde] can now run on 10+ osts.

Seagate-bug-id: MRP-2107
Signed-off-by: Jadhav Vikram <jadhav.vikram@seagate.com>
Change-Id: I29d8c77905e5f23666b0e691cc2928d0cc858f59
Reviewed-on: http://review.whamcloud.com/17794
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>