add integration test readme

[gthao313]

Issue number:
#166

Description of changes:
add integration test readme file

Testing done:

Brupop Integration Test

Introduction

Integration test is a tool that helps build automated brupop integration testing, which consists of three main subcommands Integration-test, Monitor, and Clean.

Integration-test subcommand

This allows you to set up Brupop test environment, complete Brupop installation, and label nodes.

cargo run --bin integ integration-test --cluster-name <YOUR_CLUSTER_NAME> --region <YOUR_CLUSTER_REGION> --bottlerocket-version <OLD_BOTTLEROCKET_VERSION>  --arch <ARCH> --nodegroup-name <NODEGROUP_NAME>

Monitor subcommand

This allows you to verify if that nodes are being updated to target Bottlerocket version

cargo run --bin integ monitor --cluster-name <YOUR_CLUSTER> --region <YOUR_CLUSTER_REGION>

Clean subcommand

This allows you to destroy all resources which were created when integration test installed brupop.

cargo run --bin integ clean --cluster-name <YOUR_CLUSTER_NAME> --region <YOUR_CLUSTER_REGION> --nodegroup-name <NODEGROUP_NAME>

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[gthao313]

Will make this PR ready once nodegroup PR been merged

[webern]

Consider pointing to this from the main README under "development" or "building" or something like that.

[gthao313]

push above update README to point integration testing tool under development to integ crate.