Run the integration test import twice for better test case coverage

[tdashworth]

Is your feature request related to a problem? Please describe

It would be good to have a second import of the solution (before it's uninstalled) to test additional test cases. These include:

• Ensure the solution within the package are detected and therefore the processes are enabled (please see #59)
• To hook up a custom connection reference which is first installed in the first install (please see #55)

Describe the solution you'd like

More test cases and refactoring of the test fixture to call the import a second time

Additional Context

We can only test the failing circumstances if we did two deployment rounds. This would make #58 testable too. What are your thoughts?

Yep, we've run into this issue a few times. I wonder if we can have a second test fixture that we can order to only run after the first test fixture?

Originally posted by @ewingjm in https://github.com/Capgemini/powerapps-packagedeployer-template/issues/59#issuecomment-828357622