[Fix] - Renamed "AWS_MASTER_STACK" to "AWS_STACK_NAME" when creating worker nodes
[Fix] - Renamed "AWS_MASTER_STACK" to "AWS_STACK_NAME" when creating
worker nodes

arun-gupta/kubernetes-aws-workshop,dalbhanj/kubernetes-aws-workshop,arun-gupta/kubernetes-aws-workshop,dalbhanj/kubernetes-aws-workshop,arun-gupta/kubernetes-aws-workshop,dalbhanj/kubernetes-aws-workshop,dalbhanj/kubernetes-aws-workshop,arun-gupta/kubernetes-aws-workshop