core: export function Configure
core: export function Configure

This can be used by corectl to configure a core without
using the dashboard.

Closes chain/chainprv#1549.
Reviewers: da39a3ee5e6b4b0d3255bfef95601890afd80709@erykwalder




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