go/genesis: The tests aren't actually being ran at all

[Yawning]

Nothing actually calls the genesis document tests that live under go/genesis/tests.

There isn't really a reason why they need to live in a separate test driver either (unlike the consensus backed tests) since the test document should be consensus backend agnostic, so maybe refactor the tests out to go/genesis/genesis_tests.go.

Additionally, due to the tests not being ran at all, the test cases have rotted, and need to be fixed.

[kostko]

Ooops :-)