LU-8713 utils: Try loading zfs.ko during zfs_init

LU-8713 utils: Try loading zfs.ko during zfs_init

Newer version of zfs (0.6.5.8 and 0.7.0) do not autoload zfs module at
boot nor do they load it during libzfs_init(), so try loading it
during initialization.

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Change-Id: I44765b0c2b7ea8b1c8c6d45a9107842b17623dbc
Reviewed-on: http://review.whamcloud.com/23210
Tested-by: Jenkins
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>