Contributed by Steve Loughran.
This includes
- HADOOP-15890. Some S3A committer tests don't match ITest* pattern; don't run in maven
- MAPREDUCE-7090. BigMapOutput example doesn't work with paths off cluster fs
- MAPREDUCE-7091. Terasort on S3A to switch to new committers
- MAPREDUCE-7092. MR examples to work better against cloud stores