Nova listens for EC2 calls now at the URL without path -
http://some.server.com:8773/
I was made in review -
https://review.openstack.org/#/c/152496/
So I suggest to change EC2 urls in keystone catalog.
Change-Id: Ia2975ce0f6a30eed6016733e12c98b5f97648307
Closes-Bug: 1417555