Create a "demo" HTTP API client

We want to create a simple "demo" HTTP API Client (in Java, Python or Go) that can serve as an "example framework" for people who will want to use the new API for their Frameworks.

The scope should be fairly limited (eg, launching a simple Container task?) but sufficient to exercise most of the new API endpoint messages/capabilities.

Scope: TBD

Non-Goals:

• create a "best-of-breed" Framework to deliver any specific functionality;
• create an Integration Test for the HTTP API.