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

For more details, see https://builds.apache.org/job/hadoop-qbt-branch2-java7-linux-x86/103/ [Jan 11, 2018 6:30:15 PM] (szegedim) YARN-7590. Improve container-executor validation check. Contributed by [Jan 12, 2018 10:26:08 AM] (sunilg) YARN-7727. Incorrect log levels in few logs with [Jan 12, 2

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

For more details, see https://builds.apache.org/job/hadoop-qbt-trunk-java8-linux-x86/656/ [Jan 12, 2018 5:21:17 PM] (billie) YARN-7731. RegistryDNS should handle upstream DNS returning CNAME. [Jan 12, 2018 6:41:27 PM] (eyang) YARN-5366. Improve signal handling and delete delay for Docker on Yar