test: correct error message for htlc error propagation test
test: correct error message for htlc error propagation test

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