Adds End-to-End testing for a DAP release

[jvanderhoof]

What does this PR do? Is there any background context you want to provide?

This PR adds a series of end-to-end tests for the DAP appliance. This PR intentionally leaves Jenkins driven testing out. I'll be adding this in a future PR as it will take some additional work to understand when these tests should be run.

What ticket does this PR close?

Connects to aam-architecture#8

Where should the reviewer start? How should this functionality be validated?

Top-down, I'd recommend reviewing:

• Feature - features/cluster.feature
• Steps - features/step_definitions/dap_configuration.rb, features/step_definitions/dap_validation.rb
• Provider - ci/providers/docker_compose.rb

Reviewers

• @jtuttle, @micahlee - I'd love feedback on the approach and areas of improvement
• @alexkalish - I'd love feedback on the scope of the tests