After the FeePPM miner fee fix there has probably been a race condition
in this test. The test would expect only one of the two quotes to work,
as one had a marginally high miner fee. After the FeePPM fix that miner
fee was considered valid and we dispatched two swaps instead of one,
with the test setup examining the first one that reached the go channel.
In preparation for adding loop in swaps, we relate liquidity rules
to a specific type of swap that we want to dispatch. This allows us
to use a single rule format for multiple swap types.
We add 'peer-level' rules to allow assessment of liquidity on a per-peer
level, rather than on an individual channel basis. No overlap is allowed
with the existing set of channel rules because this could lead to
contradictory rules.