Added endpoint for VNC IP binding

This change adds an endpoint for use by the compute cookbook for VNC
service IP binding.

See related change: https://review.openstack.org/83441

blueprint increase-ip-binding-flexibility

Change-Id: I04520664c50e1f23c3affa3503f4fa74f59365df
Merge "Added endpoint for VNC IP binding"
Update ChefSpec to 3.4.0

This change gives us new capabilities, such as matching notifies and
subscribes of resources.

Implements: blueprint chefspec-3-4
Change-Id: Idea59ec3399136aec196f6535a85ef116424d12e