4cdae98: Fix the AWS account we use for publishing the public example AMIs.

#86:

• BACKWARDS INCOMPATIBLE CHANGE: The lb_tags parameter in the vault-elb module has been renamed to load_balancer_tags.
• You can now set custom security group tags in the vault-elb module using the new security_group_tags parameter.
• You can now set custom security group tags in the vault-cluster module using the new security_group_tags parameter.
• You can now set custom S3 bucket tags in the vault-cluster module using the new s3_bucket_tags parameter.

#83: You can now specify a custom port number to use for Vault health checks in the vault-elb module using the optional param health_check_port.

#81: You can now set custom tags for the Vault ELB using the optional parameter lb_tags.

#80: Fix aws install with yum to use the proper package name.

#78: If you're using Vault 0.10.0 or above, the UI will now be enabled by default.

#72: The Vault user is now marked as a system user.

#70: Fix typo in the docs where we listed the parameter name as --s3-backend-enable but it should actually be --enable-s3-backend.

#69: Vault will now exit with an error if cluster_addr == api_addr, so default api_addr to a different value, and make it configurable via a new --api-addr parameter.

#68:

BACKWARDS INCOMPATIBLE CHANGE

The vault-cluster module now requires a new parameter called allowed_inbound_security_group_count to be set. This is unfortunately required to work around a limitation in Terraform with the count parameter.