Integration Test: Developer get lockfile for environment

[dcmcand]

Context

Part of https://github.com/conda-incubator/conda-store/issues/662

User Story

Persona: I'm a software engineer developing a package Need: I need to get a lockfile (breakout workflow: pinned yaml file or docker image) to store for ensured reproducibility

Test

TODO: @dcmcand work out api calls and setup needed

Setup

API Calls

Value and/or benefit

This will ensure that new releases of conda-store will not break critical user journeys.

Anything else?

Note: This integration test only covers conda-store-server and this workflow should be tested at the api level. UI logic will be tested in the conda-store-ui repo.