Let "osapi_volume_listen" can be configurable

When setup cinder in multiple nodes, cinder-api and cinder-volume
will not exist in same node, so we should avoid value of
"osapi_volume_listen" to be "0.0.0.0" and should set it as
the ip of volume api host.

Change-Id: I6daa46d497297e8e4ab9faa2caa953d242cc424e
Closes-bug: #1305157