Add VPC Connectivity SASL Scram and IAM#129

PlexusLoganPope wants to merge 8 commits intocloudposse:maincloudposse/terraform-aws-msk-apache-kafka-cluster:mainfrom

PlexusLoganPope:vpc-connectivityPlexusLoganPope/terraform-aws-msk-apache-kafka-cluster:vpc-connectivityCopy head branch name to clipboard