Unhardcode vncserver_listen option for mitaka/newton

We bind vnc for instance on all IPs at the moment, which has
negative security impact as when user has access to any of IPs of
compute host it can brute force VNC ports and connect to running
consoles.

This patch allows to bind VNC to specific IP by setting
nova:compute:bind:vnc_address option.

Change-Id: I9a5cda9e3fe17391e1caf0e51a950e7e56959aa1
Related-Prod: PROD-19011
2 files changed