[core] transaction,notifier: remove completed notifications faster.
[core] transaction,notifier: remove completed notifications faster.

 - immediately remove transaction from watchlist upon trxnotifymaxconf ; do not wait next block anymore.

coinkeeper/terracoin_20150327,coinkeeper/terracoin_20150327,coinkeeper/terracoin_20150327,coinkeeper/terracoin_20150327,coinkeeper/terracoin_20150327