Initial checkin for hdfs kerberos testing tool

Author: udlingal

samples/notebooks/hdfs-kerberos-tester.zip

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+This tool can be used to troubleshoot hdfs kerberos connections. This tool requires azure data studio tool and around 40 MB space on hard disk.
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+1. Download the hdfs-kerberos-tester.zip file to local machine.
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+2. Open the Azure Data Studio.
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+3. In Azure Data studio -> File -> Open File -> choose hdfs-kerberos-tester.ipynb and click open
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+4. It should open the Notebook.
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+5. Choose Python3 as kernel.
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+6. Click on RunCells button in Notebook.