resource
We had a line on the Update func that said:
```
Hash key can only be specified at creation, you cannot modify it.
```
The resource has now been changed to ForceNew on the hashkey
```
aws_dynamodb_table.demo-user-table: Refreshing state... (ID: Users)
aws_dynamodb_table.demo-user-table: Destroying...
aws_dynamodb_table.demo-user-table: Destruction complete
aws_dynamodb_table.demo-user-table: Creating...
aws_dynamodb_table.demo-user-table: Creation complete
```
This commit exports the `arn` as well as the `id`, since IAM
roles require the full resource name rather than just the table
name. I'd even be in favor or having `arn` as the `id` since the
<region, tablename> pair is the uniqueness constraint, but this
will keep backwards compatibility:
http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_CreateTable.html