Make EC2 compatible with current AWS CLI.

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
diff --git a/tools/create_userrc.sh b/tools/create_userrc.sh
index b43fd88..f067ed1 100755
--- a/tools/create_userrc.sh
+++ b/tools/create_userrc.sh
@@ -131,7 +131,7 @@
 
 EC2_URL=$(openstack endpoint show -f value -c publicurl ec2 || true)
 if [[ -z $EC2_URL ]]; then
-    EC2_URL=http://localhost:8773/services/Cloud
+    EC2_URL=http://localhost:8773/
 fi
 
 S3_URL=$(openstack endpoint show -f value -c publicurl s3 || true)