lnwallet: update channel state machine tests to latest changes
lnwallet: update channel state machine tests to latest changes

This commit updates the set of channel state machine tests to properly
compile and execute with the latest set of changes to the state
machine.

Most of the changes within this commit are just renaming and field
changes as a result of the new wire messages.

The more substantial change is due to the change in semantics of the
new state machine w.r.t what has and has not been ACK’d when a new
state transition is implemented. In the case of a concurrent update
(both sides add to the log before a state transition), both sides need
to trigger  a state update in order to ensure their updates have been
included.

aakselrod/lnd,LightningNetwork/lnd,aakselrod/lnd,AndrewSamokhvalov/lnd,AndrewSamokhvalov/lnd,LightningNetwork/lnd,ddustin/lnd,ddustin/lnd