Set glance_api_servers for cinder

Set glance_api_servers for cinder

This patch updates the hiera configuration for the Cinder API so
that we set glance_api_servers. By default Cinder constructs
a glance URL based on $my_ip (the local IP of the machine)
which may not be correct if you are running Glance on a non-default
internal network.

By setting glance_api_servers to the same thing we already
use for Nova we make Cinder contact the correct Glance URL
regardless of the network settings.

Change-Id: I1c56eb585ddfdc9989a8b55bc1bac819802f7794