LU-6718 build: force update of lustre-osd-zfs-mount

LU-6718 build: force update of lustre-osd-zfs-mount

Previous change fixed the lustre-osd-ldiskfs dependency,
but neglected lustre-osd-zfs.

Change the .spec file to make lustre-osd-zfs require a
specific version of lustre-osd-zfs-mount rather than
accepting just any version.

Signed-off-by: Bob Glossman <bob.glossman@intel.com>
Change-Id: Ice17e23fdf778962a1a988b563bfc426c5d41c29
Reviewed-on: http://review.whamcloud.com/15285
Tested-by: Jenkins
Reviewed-by: Brian J. Murrell <brian.murrell@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>