error after adding "userdata" or "user_data" to plugin.yaml

[DeWayne Filppi]

After adding the highlighted content to the ARIA openstack plugin.yaml,

  aria.openstack.datatypes.Server:
    description: >-
      openstack Server args.
    properties:
      server:
        type: map
        required: false
        entry_schema:
          type: string

I get the following error trying to use user_data in a template:

RuntimeError: Re-definition of yaml-1.1 in specification_url

Usage looks like:

              openstack_config: { get_input: openstack_config }
              args:
                server:
                  user_data: |
                    #!/bin/sh
                    echo TEST > /tmp/out