Unhardcode vncserver_listen option

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.

Related-Prod: PROD-19011

Change-Id: I67dc4e78ef4830d118ac0db579bd8e6897faeef6
2 files changed