Fix Multisign Tests
Fix Multisign Tests

lontivero/NBitcoin,you21979/NBitcoin,HermanSchoenfeld/NBitcoin,bitcoinbrisbane/NBitcoin,NicolasDorier/NBitcoin,thepunctuatedhorizon/BrickCoinAlpha.0.0.1,stratisproject/NStratis,MetacoSA/NBitcoin,dangershony/NStratis,MetacoSA/NBitcoin