Description of problem:
Deploying multiple assisted installers where the user does not provide the VIP addresses with the same cluster name ends up with them competing for the same DHCP leased address and conflicting.
Steps to Reproduce:
1. Deploy an assisted installer cluster without providing VIPs specifying clustername='reproducer'
2. Deploy another cluster on the same DHCP served network without providing VIP addresses and specifying the same clustername, i.e., 'reproducer'
Both the first and the second cluster ask DHCP for a lease with the same MAC address, thus the first cluster breaks as the address is taken by the second and the second fails to deploy.
Each cluster requests different addresses to DHCP so we keep allowing multiple clusters named the same
*** This bug has been marked as a duplicate of bug 1866347 ***