AVRO-1254. Fix Trevni mapreduce tests to not depend on order, which is no longer guaranteed under Java 7.  Committed to the right place this time.

git-svn-id: https://svn.apache.org/repos/asf/avro/trunk@1448804 13f79535-47bb-0310-9956-ffa450edef68
Preparing trunk for development of next release.

git-svn-id: https://svn.apache.org/repos/asf/avro/trunk@1450558 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/trunk' into trunk