fix keystone_ec2_tokens_url
fix keystone_ec2_tokens_url

remove path from OS_AUTH_URL to prevent wrong keystone_ec2_tokens_url

Change-Id: I84cbc33625da92ef9e5c943243c25ecda0805392

stackforge/ec2-api,openstack/ec2-api,stackforge/ec2-api,openstack/ec2-api