Connection queries an IBC connection end.

ConnectionEnd defines a stateful object on a chain connected to another separate one. NOTE: there must only be 2 defined ConnectionEnds to establish a connection between two chains.

Normally the RevisionHeight is incremented at each height while keeping RevisionNumber the same. However some consensus algorithms may choose to reset the height in certain conditions e.g. hard forks, state-machine breaking changes In these cases, the RevisionNumber is incremented so that height continues to be monitonically increasing even as the RevisionHeight gets reset