Updated IoT Central Java SDK examples for 2021-06-01 release#18

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gansvv merged 3 commits intoAzure-Samples:masterfrom

Nov 10, 2021

Commits on Nov 10, 2021

Updated java samples for latest working IoT Central SDK version 1.0.0-beta.2 with support for managed identity and containing other improvements
gansvv
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Minor: Updated link in readme.md
gansvv
committed
Minor: Updated readme.md
gansvv
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