This reverts commit ae03d2a721.
Cases where a deployment is using a proxy, Cinder servers won't return
the expected publicURL, and instead gives an internal URL that the
client can't use.
Commit 2eb25ab8803214cb3beb5d8fe3efbf70a462c414 in Cinder introduces the
public_endpoint config option, but not everyone is expected to be
running that later of a version to take advantage of this.
Closes-Bug: #1464160
Change-Id: I61228c1e8630b958c792be077674b48fbdb83135
1f52746bcb