ceph: configure additional lvm settings for rhel8
ceph: configure additional lvm settings for rhel8

RHEL8 introduces some lvm changes. For OSDs on PVs to work
we need to set allow_changes_with_duplicate_pvs = 1.
This is required since we're copying the block image
under another location.

Signed-off-by: travisn <a8b474fdb3f77f44446f0ab9ddca8147b09b3a9e@redhat.com>

rook/rook,rook/nfs,rook/nfs,rook/rook,rook/rook,rook/rook,rook/rook,rook/nfs