executeTransaction abi handler should not make state changes when tx is invalid

[shuse2]

Description

When executeTransaction is called and the transaction is invalid, it should not make state changes to the context and should not return any event.

Currently, state db and event queue does not support multiple snapshot. Therefore, if transaction becomes invalid by afterCommandExecute, it only rolls back to the state before calling command.execute.

1. Update event queue to maintain multiple snapshots
2. Update lisk-db to the version which supports multiple snapshot

Acceptance Criteria

• Add unit test to check if all state is rollbacked if afterCommandExecute fails
• Add unit test for event queue to check reverting to the older snapshot

Additional Information

• Possible implementation of event queue interface

const snapshotID = eventQueue.createSnapshot();
eventQueue.revertSnapshot(snapshotID);

and all snapshot can be removed when using one of the snapshot

Related: LiskArchive/lisk-db#21