Description of problem:

Currently, the engine keeps per-host its public key fingerprint, but does not keep the entire public key.

We want to use the public key for ansible.

This was attempted in the past [1] and abandoned, because it broke compatibility with v3 of the API.

We can now either decide we can break the API, or we can solve in a way that will not break the API - either by keeping both the full key and the fingerprint, and exposing both through the API, or by keeping only the full key, and expose both through the API, where the fingerprint is generated on-the-fly from the full key.

[1] https://gerrit.ovirt.org/50226