VMware: spawn refactor - phase 1 - get_vif_info

get_vif_info converts OpenStacks nova network_info
into a data structure that is used to prepare the
configuration spec for the instance that is being deployed.

partial blueprint vmware-spawn-refactor

Change-Id: I5d1535e84de44a995e1605d0d5b850c9756612de
Deprecate instance_destroy() from conductor

This deprecates the instance_destroy() method from conductor,
which is no longer used.

Related to blueprint compute-manager-objects-juno

Change-Id: Ifa0ef5fa3c1bf834be7e8f6bebe2a8ebcae9147e
Deprecate compute_unrescue() from conductor

This deprecates the compute_unrescue() method from conductor, which
is no longer used.

Related to blueprint compute-manager-objects-juno

Change-Id: I3e0670490bd566869de91347218015eed4d37f3e
Merge "Deprecate instance_destroy() from conductor"
Merge "Deprecate compute_unrescue() from conductor"
Merge "VMware: spawn refactor - phase 1 - get_vif_info"