Oracle channel config

[hujw77]

1. 读取源链 channel 的 messageRoot 的oracle和目标链 ORMP的 importMessageRoot 匹配.（Be careful, currently this match is via social consensus not protocol in contract)

[jiguantong]

Otherwise the old channel's message will be able to relay to the new channel.
https://github.com/darwinia-network/ORMP/blob/main/src/Verifier.sol#L38