Integration Test: Login and delete shared environment

[dcmcand]

Context

Part of #662

Integration test for the following user story:

User Story

Persona: I'm a tech lead that managed envs for my team
Need: I want to delete an environment

steps:

1. Login
2. Delete a shared environment

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.