CHANGES
- Use AWS ParallelCluster Terraform Provider 1.x in all module examples.
 - Use ParallelCluster API 3.11.1 in all examples with stack name ParallelClusterAPI.
 - Deploy login nodes in all module examples.
 
BUG FIXES
- In submodule 
required_infra, enable DNS hostnames for the created VPC to prevent validation error upon cluster creation.