LU-8323 tests: Fix interop for set_hostid

LU-8323 tests: Fix interop for set_hostid

Version check set_hostid in formatall, since older ZFS doesn't "need"
it.

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Change-Id: Ica354c00cc2e53c533524df2a41b22226173fbfd
Reviewed-on: http://review.whamcloud.com/21438
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>