LU-9888 tests: Update disk2_7-zfs.tar.bz2 for quota

LU-9888 tests: Update disk2_7-zfs.tar.bz2 for quota

Add a blimit file with the larger 40960 limit in it, as this seems to
be how the image was created, but the default (without this file) is
20K.
Also add an ilimit file with 4 (default for new images).  Old default
value is 2.

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Change-Id: I33921ac58a5252f3259145d5e00faedcd21559f9
Reviewed-on: https://review.whamcloud.com/28820
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Wei Liu <wei3.liu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>