Expand integration tests to cover all fields

[jaredlockhart]

Our current integration tests cover only the minimal set of fields required to launch an experiment. However we have recently seen that we can introduce regressions in some fields that are not caught by either the unit or integration tests, so in addition to addressing more specific issues, let's expand the integration tests to include filling out all fields as well as asserting their saved state before launch. This should provide some additional coverage in case unit tests fail to cover a particular case.

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