Add grr collection E2E test

[ramo-j]

We should have e2e tests for grr collection modules. This would depend on setting up a grr test environment as well.

[tomchop]

We have this already in our private jenkins instance, although they're not proper python e2e tests. Is converting them to python what this issue is about?

[ramo-j]

This issue started because I managed to miss them in the jenkins test list. However, having found them later, I notice they only run the recipe, and fail if the run fails. There's no checking for correct output as we do in the other e2e's so I think there could be room for improvement.

[tomchop]

OK, sounds good, just to make sure we're on the same page :)

[ramo-j]

Any changes relating to this should cover the default artefact sets (re: #621)