Adding intel_iommu=on kernel parameter on Mellanox deployment

The kernel parameter is necessary for enabling SR-IOV.
It will be added automatically on every deployment using Mellanox.

DocImpact
Closes-bug: #1391776
Signed-off-by: gilmeir <gilmeir@mellanox.com>
Change-Id: I7c6ff21b0624cd746a213b77facd2f129ceb7bbe
Merge "Adding intel_iommu=on kernel parameter on Mellanox deployment"