template validate returns 500

[Removed by request]

template validation usually returns 400 or errors, but on this case it returns 500.
Tested with python-heatclient-0.2.9-1.el7ost.noarch

Template:
--------------------
heat_template_version: 2013-05-23

description: >
  this should fail horribly

parameters:
  public_net_id:
    type: string
      this is where the error is
    default: error

resources:
  router:
    type: OS::Neutron::Router
  router_gateway:
    type: OS::Neutron::RouterGateway
    properties:
      router_id: { get_resource: router }
      network_id: { get_param: public_net_id }
--------------------

DEBUG:

http://10.35.160.79:8004/v1/b2876028bc2d48d591c71e27641337ea/validate
DEBUG (http:122)
HTTP/1.1 500 Internal Server Error
date: Wed, 02 Jul 2014 10:56:45 GMT
content-length: 297
content-type: application/json; charset=UTF-8

{"explanation": "The server has either erred or is incapable of performing the requested operation.", "code": 500, "error": {"message": "Remote error: InvalidSchemaError Invalid type (string this is where the error is)", "traceback": null, "type": "RemoteError"}, "title": "Internal Server Error"}

Traceback (most recent call last):
  File "/usr/bin/heat", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/site-packages/heatclient/shell.py", line 432, in main
    HeatShell().main(args)
  File "/usr/lib/python2.7/site-packages/heatclient/shell.py", line 388, in main
    args.func(client, args)
  File "/usr/lib/python2.7/site-packages/heatclient/v1/shell.py", line 556, in do_template_validate
    validation = hc.stacks.validate(**fields)
  File "/usr/lib/python2.7/site-packages/heatclient/v1/stacks.py", line 160, in validate
    resp, body = self.client.json_request('POST', '/validate', data=kwargs)
  File "/usr/lib/python2.7/site-packages/heatclient/common/http.py", line 235, in json_request
    resp = self._http_request(url, method, **kwargs)
  File "/usr/lib/python2.7/site-packages/heatclient/common/http.py", line 196, in _http_request
    raise exc.from_response(resp)
heatclient.exc.HTTPInternalServerError: ERROR: Remote error: InvalidSchemaError Invalid type (string this is where the error is)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/104189

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/104189
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=4503154c1241b73f8efd483b41c111fefe3aaa6e
Submitter: Jenkins
Branch: master

commit 4503154c1241b73f8efd483b41c111fefe3aaa6e
Author: Thomas Herve <email address hidden>
Date: Wed Jul 2 15:12:46 2014 +0200

    Fix serialization of InvalidSchemaError

    Move InvalidSchemaError to heat.common.exception and pass a keyword
    argument so that it can be serialized properly.

    Change-Id: Iada3273b2b0b129bc0125b68fecf1e0efc081611
    Closes-Bug: #1336740