LU-8342 utils: Set dnodesize/recordsize at zfs dataset create

LU-8342 utils: Set dnodesize/recordsize at zfs dataset create

After the zfs dataset is created, attempt to set the
dnodesize and recordsize properties. Moved xattr=sa to be
consistent with the new method of setting dataset properties.

Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Change-Id: I12e5863e4602496b85f8512ea780be4589489d01
Reviewed-on: https://review.whamcloud.com/21055
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Olaf Faaland-LLNL <faaland1@llnl.gov>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>