Fix bitcoin-util-test for latest updates.
Fix bitcoin-util-test for latest updates.

It was still using bitcoin-tx for some recently added tests, fix that.
Requires also updating the address used (to the NMC-base58 of the same
hash value).

pataquets/namecoin-core,namecoin/namecore,pataquets/namecoin-core,namecoin/namecore,namecoin/namecoin-core,domob1812/huntercore,domob1812/namecore,pataquets/namecoin-core,pataquets/namecoin-core,brandonrobertz/namecoin-core,domob1812/huntercore,wiggi/huntercore,wiggi/huntercore,namecoin/namecore,brandonrobertz/namecoin-core,domob1812/huntercore,domob1812/namecore,namecoin/namecore,namecoin/namecoin-core,domob1812/namecore,domob1812/namecore,domob1812/huntercore,domob1812/huntercore,domob1812/huntercore,namecoin/namecoin-core,namecoin/namecoin-core,pataquets/namecoin-core,brandonrobertz/namecoin-core,wiggi/huntercore,brandonrobertz/namecoin-core,brandonrobertz/namecoin-core,brandonrobertz/namecoin-core,domob1812/namecore,namecoin/namecore,pataquets/namecoin-core,namecoin/namecoin-core,namecoin/namecore,namecoin/namecoin-core,wiggi/huntercore,domob1812/namecore,wiggi/huntercore,wiggi/huntercore