Add min swap amount to each host zone config for improve cross chain swap call

[tnv1]

Closed #155.

[nghuyenthevinh2000]

Please provide relevant tests for logic

[tuantran1702]

I wonder why we have two instances of HostChainFeeAbsConfig in both interchaintest and x/feeabs package? What is the context behind this? @tnv1 @nghuyenthevinh2000

[nghuyenthevinh2000]

I wonder why we have two instances of HostChainFeeAbsConfig in both interchaintest and x/feeabs package? What is the context behind this? @tnv1 @nghuyenthevinh2000

That is due to json unmarshall structure, field pool id in feeabs is uint, which json string cannot be unmarshaled into, thus needed a string field

[nghuyenthevinh2000]

@tropicaldog you forgot to add a success case