Update readme

Author: pmasl

samples/manage/hdfs-kerberos-tester/readme

@@ -1,21 +1,19 @@
-This tool can be used to troubleshoot HDFS Kerberos connections for PolyBase, when you experience HDFS Kerberos failure while creating an external table in a Kerberos secured HDFS cluster. This tool helps identify the following issues:
-   i.    Username/password misconfigurations
-  ii.    Cluster Kerberos setup misconfigurations     
+# HDFS Kerberos Tester
+Use the HDFS Kerberos tester to troubleshoot HDFS Kerberos connections for PolyBase, when you experience HDFS Kerberos failure while creating an external table in a Kerberos secured HDFS cluster. 
 
- 
-
-This tool is completely independent from SQL Server, and can assist in ruling out non-SQL Server issues, and  concentrate on resolving HDFS Kerberos setup issues. This tool requires Azure Data Studio and around 40 MB of hard disk space. 
+This tool will assist in ruling out non-SQL Server issues, to help you concentrate on resolving HDFS Kerberos setup issues, nanely identifying the following issues:
+- Username/password misconfigurations
+- Cluster Kerberos setup misconfigurations     
 
- 
+This tool is completely independent from SQL Server. It is available as a Jupyter Notebook, requires Azure Data Studio, and around 40 MB of hard disk space. 
 
-1. Download all the content in this location to your local machine. Please make sure all these files are co-existed in same folder.
+## Instructions
+1. Download all the content in this location to your local machine. Please make sure all these files are co-located in same folder.
 
 2. Open the Azure Data Studio.
 
-3. In Azure Data studio goto -> File -> Open File -> go to the folder where hdfs-kerberos-tester.ipynb exist, choose hdfs-kerberos-tester.ipynb and click open
-
-4. It should open the Notebook.
+3. In Azure Data studio click the **File** top menu -> **Open File** -> navigate to the folder where you saved the hdfs-kerberos-tester.ipynb. Choose hdfs-kerberos-tester.ipynb and click open.
 
-5. Choose Python3 as kernel.
+4. After the Notebook has loaded, choose **Python3** as kernel.
 
-6. Click on all RunCells button in Notebook and follow instruction in notebook.
+5. Click on all **RunCells** button in the Notebook and follow instruction in the Notebook.