Current AIAP implementation has support for multiple VMs for
target/worker with an attribute "count".
But this is not supported for corresponding new MAC addresses.
The current implementation has mac address fixed for one
target node/one worker node.
This PS provide change in ansible playlist to handle
MAC addresses as list.
Closes: #640
Relates-To: #640
Change-Id: I14b6e2e4d9e81a4f1cf114c26f94328a1461134f