cmd/corectl: init schema always
cmd/corectl: init schema always

Commit d60006e1bed503a638ec1799b99fa990f38e4872 said it
would load the schema "before doing other database
work". But all of the subcommmands do database work, not
just those two. Let's fix this.

Closes chain/chainprv#2158

chain/chain,chain/chain,chain/chain,chain/chain,chain/chain,chain/chain