Mellanox Changes in deployment serializers

Added Changes to deployment serializers, in case of Mellanox
features usage:
  1. Changing network scheme to use a predefined name for storage interface,
     in case of iSER usage.
  2. Adding physical port to mellanox astute.yaml in case of choosing Mellanox
     components (for attaching virtual functions to virtual machined).

partially implements: blueprint mellanox-features-support

Change-Id: I0d83819a22177028bffbaca7d1f0e1499e8909c5
Signed-off-by: Aviram Bar-Haim <aviramb@mellanox.com>
Merge "Mellanox Changes in deployment serializers"