HADOOP-16058. S3A tests to include Terasort. 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