Faucet apt packages don't cleanly install on Ubuntu Eoan (19.10)

[gizmoguy]

In ubuntu eoan they have a version of pyyaml and eventlet that is too new for us:

root@2160483b72be:/# apt-get install python3-faucet
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 python3-faucet : Depends: python3-yaml (< 3.14) but 5.1.2-1 is to be installed
                  Depends: python3-eventlet (< 0.24.2) but 0.25.0-0ubuntu1 is to be installed

We should re-investigate which eventlet version we want to use (#2933) and which version of pyyaml to use (#3139).

For now there is a workaround to install on Ubuntu eoan:

sudo apt-get install python3-eventlet=0.24.1-2 python3-yaml=3.13-2
sudo apt-get install (faucet-all-in-one|faucet|python3-faucet)

[gizmoguy]

Looks like pyyaml 5.2 is what we want to use going forward, which should be out soonish.