Add RDS CA Cert variable to rds/mariadb module

Added

• In rds/mariadb module, added an optional variable ca_cert_identifier to specify the CA Certificate for the RDS instance.
• In rds/mariadb module, added an optional variable apply_immediately to force any changes to be applied immediately rather that at the next maintenance window.

VPC transit gateway

Added

• In the vpc module, add the ability to route to transit gateway instead of NAT gateway.

Changed

• Made the aws access key variables not required in the rds/backup module.

Add tags variable to ecs/cluster module

Added

• Added a variable to specify tags to apply to the ECS cluster in the ecs/cluster module.

Removed an unused policy in backup module

Fixed

• Removed an unused policy in backup module that causes authorization problems in Terraform. Error message produced was "Error: error creating Backup Vault Policy (ethnologue-cam-prod-db-backup-vault): AccessDeniedException: status code: 403, request id:". Removing this policy causes no problems with backup operation or restore operation. It also increases security by restricting access to the backup vault.

Update the Launch Template version number each time

Fixed

• Rather than setting the default_version to 1, use the latest version (documentation)

Configurable VPC CIDR blocks

Added

• Enable using a custom CIDR block for the VPC (optional)
• Make the public subnets' CIDR blocks configurable (optionally)
• Make the private subnets' CIDR blocks configurable (optionally)
• Add new variables to vpc's README's list of optional inputs

Fixed

• Fix typo in vpc README example

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Note:
I set the defaults to match the calculated values we have been using, so that this should be a non-breaking change (unless someone is using more than 4 availability zones, which we aren't, as far as I am aware).

New cloudtrail input `is_multi_region_trail`

Added

• New variable is_multi_region_trail to cloudtrail module

New variable 'cpu_credits' in asg and asg-ebs modules

Added

• Added optional variable cpu_credits to the asg and asg-ebs modules.

New variable `create_nat_gateway` in the VPC module

Added

• Added new variable create_nat_gateway to the VPC module.

fix aws/rds/mariadb module

Fixed

• Fix a bug introduced in v8.2.0 indicated by error messages:
  • "username": conflicts with replicate_source_db
  • expected replica_mode to be one of [open-read-only mounted]