[6] Add a Integration Test Stage to the delivery pipeline

[AdamAH2000]

As a developer I need a Integration Test Stage in the pipeline So that integration tests can be run with behave against the Dev deployment

Details and Assumptions

• [document what you know]

  Acceptance Criteria

  Given a fully functional delivery pipeline
  When a new pull request is merged in to the main 
  Then the integration test stage will be run automatically