lnwallet: generate a commitment transaction signature fo bob in wallet_test.go
lnwallet: generate a commitment transaction signature fo bob in wallet_test.go

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