YARN-11404. Add junit5 dependency to hadoop-mapreduce-client-app to fix few unit test failure#5295

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susheel-gupta wants to merge 3 commits intoapache:trunkfrom

susheel-gupta:YARN-11404

Commits on Jan 12, 2023

upgraded junit4 to junit5 for fixing few jenkins test failure
susheel-gupta
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Commits on Jan 13, 2023

redid all unnecessary methodmodifier changes
susheel-gupta
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Commits on Jan 19, 2023

removed lenient strictness and the unstubbed lines
susheel-gupta
committed