fullblocktests: Add additional validation tests.
fullblocktests: Add additional validation tests.

* Test early vote bits rule
* Invalid dev-org output script
* Invalid dev-org output script version

jrick/btcd,decred/dcrd,jrick/dcrd,jrick/btcd,jrick/btcd,jrick/dcrd,decred/dcrd,jcmincke/dcrd,jcmincke/dcrd,jcmincke/dcrd