Fixed miner test

- Changed test pubkey script to the same one used in genesis
- Changed the simulated block interval to 60 seconds
- Replaced extranonce/nonce combinations to be valid on top of our genesis block.
- Added check to make sure all created blocks are included in the active chain
DUST fix for transaction tests

DOGE does not have a DUST limit, so the only valid test
for us is that a value of 1 should not be marked as dust
Merge pull request #470 from patricklodder/1.7-dev-tx_test_dust

transaction tests: fix dust test.
Merge pull request #468 from patricklodder/1.7-dev-miner-test

Fixed miner test