Force the state to be evaluated before running package tests

[cpuguy83]

Right now the solved state for packages and containers are not actually evaluated until it hits the test runner, which itself forces evaluation since it needs to inspect some of the real state.
This can make the errors confusing since it looks like a test failed when in reality the build just failed.

Since we are always going to need to evaluate the state to run tests (assuming there are tests), we should just always force the evaluation before passing it off to the test runner.