Add test for cached immature credit flag not being cleared in CWalletTx::MarkDirty() bug, which was fixed in https://github.com/bitcoin/bitcoin/pull/8717, commit a560378.
Add test for cached immature credit flag not being cleared in CWalletTx::MarkDirty() bug, which was fixed in https://github.com/bitcoin/bitcoin/pull/8717, commit a560378.