Apache Hadoop qbt Report: trunk+JDK8 on Linux/x86

For more details, see https://builds.apache.org/job/hadoop-qbt-trunk-java8-linux-x86/1077/ [Mar 15, 2019 4:16:59 AM] (bharat) HDDS-761. Create S3 subcommand to run S3 related operations. [Mar 15, 2019 5:21:08 AM] (umamahesh) HDFS-14354: Refactor MappableBlock to align with the implementation

Apache Hadoop qbt Report: branch2+JDK7 on Linux/x86

For more details, see https://builds.apache.org/job/hadoop-qbt-branch2-java7-linux-x86/262/ [Mar 15, 2019 9:02:20 PM] (inigoiri) HDFS-14366. Improve HDFS append performance. Contributed by Chao Sun. -1 overall The following subsystems voted -1: asflicense findbugs hadolint pathlen