Refactored TransportIndexReplicationOperationAction to be able to expose the shard id related to a shard failure

The `ShardOperationFailedException` is now created within `TransportIndexReplicationAction` passing in the current shard id as a constructor argument.
Also replaced `AtomicReferenceArray<Object>` with `AtomicReferenceArray<ShardActionResult>`, where `ShardActionResult` wraps the `ShardResponse` or the failure, containing all the needed info.
Minor cleanups.
Class name typo.