Adding virtual port renaming in case of iSER

Due to RDMA requirement, storage port is changed to a virtual
port on the hypervisor in case of choosing iSER.

The virtual port is renamed to a predefined name that has
already been serialized to astute.yaml network scheme.

This change includes:
  1. Adding a call to a the bash script from stage zero in site.pp
     OS_common class, in case of choosing iSER.
  2. Adding a template of the bash script to a new empty puppet module
     that will include Mellanox manifests.
  3. Adding iser_rename manifest to call the bash script in stage zero.

partially implements: blueprint mellanox-features-support

Change-Id: I2828427e096245408fa536904ea9cece39256ef0
Signed-off-by: Aviram Bar-Haim <aviramb@mellanox.com>
Merge "Adding virtual port renaming in case of iSER"