LU-5465 build: strengthen Lustre DKMS RPM install

LU-5465 build: strengthen Lustre DKMS RPM install

This patch adds more control in Lustre DKMS RPM to take care that
its further install+build will not conflict with legacy lustre-osd
and lustre-modules RPMs already installed.

Signed-off-by: Bruno Faccini <bruno.faccini@intel.com>
Change-Id: Ie35e96326811f239d614aea19ae179b73c5961f3
Reviewed-on: http://review.whamcloud.com/11776
Tested-by: Jenkins
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>