write goverance unit tests and examples for conway features

[JaredCorduan]

Here is a non-comprehensive list of unit tests we might wish for conway:

• [x] if you submit a governance action, it is add to the governance state as the latest action
• [x] you can add a governance action and vote on the action at the same time. or vote on a different existing action.
• [x] if a CC/DRep/SPO votes on a governance action, their vote appears in the governance state
• [x] if a stake credential delegates to a DRep, the delegation relation is updated as expected
• [x] CC members ~cannot vote~ votes do not count after their term expires
• [x] ~The CC enters a state of no confidence~ CC votes are counted as No if too many members retire
• [ ] If a stake credential delegates to a pre-defined DRep (abstain or no confidence), their stake is accounted for in ratification
• [x] a governance action with enough votes is staged for enactment on the epoch boundary (we probably want a test for each action type)
• [x] governance actions that never get enough votes are eventually expired
• [ ] ~governance actions are dropped when a motion of no confidence is enacted~

[lehins]

I think at this point we just need to confirm that we already have implemented all these scenarios.

From a quick glance I think this is the case, but it would be nice for someone to lookup those individual tests and confirm this for sure

[teodanciu]

CC members cannot vote votes do not count after their term expires

A test for this exists in RatifySpec , so ticking it off the list.