QA: Introduce some additional unit tests for coin caches
QA: Introduce some additional unit tests for coin caches

We needed better test coverage for index based outpoint functionality. These tests provide that.

nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official,nlgcoin/guldencoin-official