Add configuration for glance-api used by cinder.

Adding configuration for glance-api used by cinder.  This is necessary
in multi-node installations to allow nova boot from an image based
volume to work properly.  Glance-api for cinder is currently being set
to 127.0.0.1 by default.

Closes-Bug: #1286088
Change-Id: I35f789e07ad317e7c8952beb4192c1f4159383d4
Merge "Add configuration for glance-api used by cinder."