Updated openstack/openstack
Project: openstack-dev/devstack  bd546c600fa80fdee8f460e761581c0e87433d70
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Update client-env to use openstackclient commands

Updated the only instance of a keystoneclient command, to
check if the identity service is enabled.

Change-Id: If86f71c1610a79690d6c6a8eb423b6fa234372bb