ec2_vpc module not idempotent

[colin byrne]

this module does not seem to be idempotent. Here is the documentation: http://docs.ansible.com/ansible/ec2_vpc_module.html,  which seems to indicate that VPC's will NOT be created if a VPC already exists with equivalent resource_tags and cidr_block values. 

Unfortunately, as many times as I run this role, it will create a new VPC. 

Here is my usage: 

- name: create vpcs

  ec2_vpc:

    state: '{{ item.state }}'

    region: '{{ item.region }}'

    vpc_id: '{{ item.vpc_id }}'

    cidr_block: '{{ item.cidr_block }}'

    resource_tags: { "Name": "{{item.name}}" }

    subnets: '{{ item.subnets }}'

    internet_gateway: '{{ item.internet_gateway }}'

    route_tables:

      - subnets: '{{ item.route_tables.private_subnets.subnets }}'

        routes:

          - dest: '{{ item.route_tables.private_subnets.routes.dest }}'

            gw: '{{ item.route_tables.private_subnets.routes.gw }}'

      - subnets: '{{ item.route_tables.public_subnets.subnets }}'

        routes:

          - dest: '{{ item.route_tables.public_subnets.routes.dest }}'

            gw: '{{ item.route_tables.private_subnets.routes.gw }}'

  with_items: vpcs

  register: vpc

Thanks for any help/guidance.