VPC1.yml : CF template that creates a VPC with Subnets, RoutingTables, IGW, NAT-GW, SG etc.
Validation1.yml: Launches workload in VPC1 with a ELB.
VPC2.yml: Create a second VPC VPC2. Peer VPC1 and VPC2 using VPC peering.
Validation2.yml: Launch workloads to verify the VPC peering functionality.