HADOOP-15278 log s3a at info. Contributed by Steve Loughran.

hadoop-common-project/hadoop-common/src/main/conf/log4j.properties

@@ -172,9 +172,9 @@ log4j.appender.DNMETRICSRFA.MaxFileSize=64MB
 
 
 # AWS SDK & S3A FileSystem
-log4j.logger.com.amazonaws=ERROR
+#log4j.logger.com.amazonaws=ERROR
 log4j.logger.com.amazonaws.http.AmazonHttpClient=ERROR
-log4j.logger.org.apache.hadoop.fs.s3a.S3AFileSystem=WARN
+#log4j.logger.org.apache.hadoop.fs.s3a.S3AFileSystem=WARN
 
 #
 # Event Counter Appender