Add msg_filter decorator to ante_handle to block IBCTimeoutOnClose

[dimiandre]

Add msg filter decorator to ante handler, to prevent the closing of re-opened channels on Terra side

Todo: Switch IBC to v3 once #279 is merged and this branch rebased

Related to https://github.com/osmosis-labs/osmosis/commit/78ed8771627b6dd9c55272e0ba857c80545d6bc5

[the-frey]

Happy with this, but should merge #278 first I think.

[faddat]

I've enabled auto merge here but am not approving since @vuong177 has approved for Notional.