Add integration test script

[gregtyler]

Purpose

Add an integration test script to be run in the pipeline and check the application works correctly.

Fixes SSM-72 #minor

Approach

Starts up the application and sends example files to it to check the are correctly parsed.

For files which create cases, it also checks that a message has been added to the SQS queue.

I updated the Sirius mock to generate unique UIDs on each request, which is used to ensure the SQS message relates to the most recent file.

Fixed a few issues with our existing test files.

Removed LPA002 and LPA002R from NewCaseDocuments, as they should be supplied alongside LP2s which create the case.

Learning

Bash really mangled the output of the SQS message, stripping away slashes that made it invalid JSON. I avoided this in the end by doing all the manipulation in one jq statement, but it was a sticking point when I had a different approach.

GitHub Actions doesn't support v1 docker-compose so I had to update our scripts to v2 docker compose

I needed to update the localstack healthcheck script because it was reporting as healthy too early

Checklist

• I have performed a self-review of my own code
• I have added relevant logging with appropriate levels to my code
  • N/A
• I have updated documentation where relevant
  • N/A
• I have added tests to prove my work