openstack client requires access to keystone's v2.0 adminURL, when it really shouldn't

Issue

Keystone v2.0 provides different set of URLs for different kinds of requests:

• adminurl: for admin requests
• internalurl: for internal services
• publicurl: for public requests

openstackclient requires access to adminURL in cases when it is not needed. For example, every user should be able to create and list his EC2 credentials (""openstack ec2 credentials list"" command), but for some reason openstack client uses adminURL to process such requests and hangs if it is not available.