由于缺少工件jdk.tools:jar，使用maven的hadoop-common构建失败

尝试使用命令构建hadoop-common项目，

  mvn generate-sources generate-test-sources

构建因错误而失败：

[ERROR] Failed to execute goal on project hadoop-annotations: Could not resolve dependencies for project org.apache.hadoop:hadoop-annotations:jar:3.0.0-SNAPSHOT: Could not find artifact jdk.tools:jdk.tools:jar:1.6 at specified path /usr/lib/jvm/java-11-openjdk-amd64/../lib/tools.jar -> http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException

openjdk-11版本中缺少tools.jar。