Support ClaimItems

[longfin]

This bridge only covers TransferAsset and UnloadFromMyGarages. therefore, if we want to maintain item token balance on multiple planets as downstream under the major planet (upstream), we need to have dedicated addresses per planets for them.

This approach seems quite simple but also it makes hard to maintain since we need to predict demands on each planets and prepare balance for them.

So, if the bridge can handle ClaimItems directly (like UnloadFromMyGarages), we should care about only the upstream planet.