lnwallet: re-introduce rpc calls during channel reservation workflow
lnwallet: re-introduce rpc calls during channel reservation workflow

* In preparation for regression testing once nodetest is finished.
* These sections we’re previously uncommented to allow for testing the
wallet without a full-node hooked up.

AndrewSamokhvalov/lnd,LightningNetwork/lnd,bryanvu/lnd,aakselrod/lnd,BitfuryLightning/lnd,ddustin/lnd,ddustin/lnd,BitfuryLightning/lnd,aakselrod/lnd,bryanvu/lnd,LightningNetwork/lnd,AndrewSamokhvalov/lnd