HDFS-15991. Add location into datanode info for NameNodeMXBean#2933

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tasanuma merged 3 commits intoapache:trunkfrom

tomscut:HDFS-15991

Apr 26, 2021

Commits on Apr 19, 2021

HDFS-15991. Add location into datanode info for NameNodeMXBean
tomscut
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Commits on Apr 23, 2021

improve the Web UI, improve the unit test
tomscut
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Commits on Apr 25, 2021

fix checkstyle
tomscut
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