fix DVPL-3554: splunk6 add new WinRegMon and need to handle duplicate key

fix DVPL-3554: splunk6 add new WinRegMon and need to handle duplicate
key
Code Fix for DVPL-2678 and add unittest

fix DVPL-2678: unhandled exception when reading result stream
Implement Idisposible in ResponseMessage Class
feedback fix
Merge branch 'fixCSharpUnittestForMSTestRun' of https://github.com/splunk/splunk-sdk-csharp into fixCSharpUnittestForMSTestRun
remove ExportResultsStream class and use only ResponseStream class for both export and Result stream
Merge branch 'fixCSharpUnittestForMSTestRun' into develop