isSpent logic
isSpent logic

- Bitcoind's CCoinsViewMempool brings the mempool into view, but will not consider outputs therein as spent
- Changed the test description to match what is happening in that view
- Once a given tx has one confirmation, then isSpent will be true for those outputs
phplaboratory/psiacore-node,kleetus/bitcore-node,phplaboratory/psiacore-node,zcoinrocks/bitcore-node,phplaboratory/psiacore-node,phplaboratory/psiacore-node,snogcel/bitcore-node-dash,zcoinrocks/bitcore-node,snogcel/bitcore-node-dash,phplaboratory/psiacore-node,kleetus/bitcore-node,braydonf/bitcore-node,braydonf/bitcore-node