Regression: Add ZMQ tests

[DyrellC]

Description

Add to the current tests to account for zmq topic publishing. It is intended to catch any breaking changes to zmq publishing of transaction and milestone data.

Fixes #1598

Type of change

• Enhancement (a non-breaking change which adds functionality)

How Has This Been Tested?

• Tests were run locally to ensure zmq steps work in the different machines that they have been added to

Checklist:

• [x] My code follows the style guidelines for this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have added tests that prove my fix is effective or that my feature works

[GalRogozinski]

@DyrellC let's update this test with #1772 and merge