Updated openstack/openstack
Project: openstack/keystone  ee48fd4f96b55d1f4dfc2f0b9f9a535942de5603
null
Use WebOb directly in ec2_token middleware

When https://review.openstack.org/#/c/71494/ was introduced, it
forgot to change ec2_token as well. This caused errors when building
docs.

Change-Id: I051519c815ed5ae60ec07203073131db1e031e10