Add long signature fix unit tests
Add long signature fix unit tests

(cherry picked from commit 9b8f898b5dffbc923dda80f1dd205ddb6e66c3d6)

glv2/peerunity,glv2/peerunity,DigitalPandacoin/pandacoin,ppcoin/ppcoin,peercoin/peercoin,peercoin/peercoin,peercoin/peercoin,peercoin/peercoin,glv2/peerunity,DigitalPandacoin/pandacoin,peercoin/peercoin,peercoin/peercoin,ppcoin/ppcoin,DigitalPandacoin/pandacoin,glv2/peerunity,DigitalPandacoin/pandacoin,ppcoin/ppcoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin,ppcoin/ppcoin