Better test log output
Updated updatebyquery to more recent master

Merged from
  martijnvg/elasticsearch@a3ac939bce8ed00d40b7e596f88b7f4150769486
with only little adpatation (most of them due to the plugin nature).

Noticable difference in document version retrieval in
  TransportShardUpdateByQueryAction.BatchedShardUpdateByQueryExecutor

Conflicts:
	src/main/java/org/elasticsearch/action/updatebyquery/IndexUpdateByQueryResponse.java
	src/main/java/org/elasticsearch/action/updatebyquery/ShardUpdateByQueryResponse.java
	src/main/java/org/elasticsearch/action/updatebyquery/TransportShardUpdateByQueryAction.java
	src/main/java/org/elasticsearch/action/updatebyquery/UpdateByQueryRequest.java
	src/main/java/org/elasticsearch/action/updatebyquery/UpdateByQueryRequestBuilder.java
	src/main/java/org/elasticsearch/action/updatebyquery/UpdateByQueryResponse.java
	src/main/java/org/elasticsearch/common/lucene/TopLevelFixedBitSetCollector.java
	src/test/java/org/elasticsearch/test/integration/updatebyquery/UpdateByQueryTests.java