Move from keystoneclient to openstackclient in eucarc

Updating an ec2 create command to openstackclient syntax.

Change-Id: I3dd21ddd52b77f3af76988db9ae6b863427d9106
Merge "Move from keystoneclient to openstackclient in eucarc"
Merge branch 'master' of github.com:openstack-dev/devstack