Adding OFED drivers installation

1. adding OFED pre req to CentOS if mlnx enabled
2. adding OFED installation at kickstart postinstall
3. adding OFED pre req to Ubuntu if mlnx enabled
4. adding OFED installation to preseed late command

partially implements: blueprint mellanox-features-support
Signed-off-by: Moshe Levi <moshele@mellanox.com>

Change-Id: I10d1e26aff99f6d6360a6de6f1f385d1c28157d9
Merge "Adding OFED drivers installation"