400 bad request when token is too large

When running tempest test in my local test environment i get 400 bad requests from Glance due to the token being too large. My service catalog has about 17 entries.

The error coming back from Glance tells me nothing useful

 Traceback (most recent call last):
  File "/var/lib/tempest/tempest/api/compute/images/test_images_oneserver.py", line 66, in setUpClass
    resp, server = cls.create_server(wait_until='ACTIVE')
  File "/var/lib/tempest/tempest/api/compute/base.py", line 117, in create_server
    name, image_id, flavor, **kwargs)
  File "/var/lib/tempest/tempest/services/compute/json/servers_client.py", line 82, in create_server
    resp, body = self.post('servers', post_body, self.headers)
  File "/var/lib/tempest/tempest/common/rest_client.py", line 302, in post
    return self.request('POST', url, headers, body)
  File "/var/lib/tempest/tempest/common/rest_client.py", line 436, in request
    resp, resp_body)
  File "/var/lib/tempest/tempest/common/rest_client.py", line 486, in _error_checker
    raise exceptions.BadRequest(resp_body)
BadRequest: Bad request
Details: {u'badRequest': {u'message': u'HTTPBadRequest (HTTP 400)', u'code': 400}}

But if i capture some packets i can see that it's a problem with the headers

##
T 115.146.85.xxx:35057 -> 115.146.84.xxx:9292 [A]
  HEAD /v1/images/22b9e4a4-7c4b-42bb-8251-f30a81fffaeb HTTP/1.1..Host: glance-h.dev:
##
T 115.146.84.xxx:9292 -> 115.146.85.xxx:35057 [AP]
  HTTP/1.0 400 Header Line Too Long..Connection: close..Content-length: 0....

There has been a similar bug reported for nova https://bugs.launchpad.net/keystone/+bug/1190149