CAMEL-5971: hdfs producer will close stream after writing if not using split strategy. As otherwise the file would not be visible for other parties. And the file would only be closed when stopping Camel which is very wrong.

git-svn-id: https://svn.apache.org/repos/asf/camel/trunk@1441387 13f79535-47bb-0310-9956-ffa450edef68