Cosmos-sdk: Cleanup leftover "revoked" terminology from genesis and docs

[ValarDragon]

Summary

In the genesis file we use "revoked", but in the code we use "jailed". It would be nice if we stuck with one term everywhere. I'm personally in favor of revoked.

/cc @rigelrozanski @cwgoes @alexanderbez

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[rigelrozanski]

it's just remnants - revoked simply needs to be removed from the genesis - we've made the decision in previous conversations to switch to jailed: here https://github.com/cosmos/cosmos-sdk/issues/1879 and here https://github.com/cosmos/cosmos-sdk/issues/1305#issuecomment-411356706

[ValarDragon]

We also need to update the docs/spec. "Revoke" is used alot in there.