[qa] Change default scriptPubKey in coinbase
[qa] Change default scriptPubKey in coinbase

This change was added in 0ce73985 by @casey and is required for
p2p-compactblocks tests.

bitcoinxt/bitcoinxt,bitcoinxt/bitcoinxt,dagurval/bitcoinxt,bitcoinxt/bitcoinxt,dagurval/bitcoinxt,bitcoinxt/bitcoinxt,bitcoinxt/bitcoinxt,dagurval/bitcoinxt,bitcoinxt/bitcoinxt,dagurval/bitcoinxt,dagurval/bitcoinxt,dagurval/bitcoinxt