Vscode-extension-for-zowe: deleteDataSet not working

[Pranay154]

Describe the bug

When I click "Delete Data set" or "Delete PDS", I get an error message and the data set isn't deleted. (More info in the screenshot below)

To Reproduce

Steps to reproduce the behavior:

1. Create a sequential or partitioned data set
2. Click on Delete Data set/PDS
3. An error message should pop up explaining why the dataset isn't/can't be deleted

Expected behavior

The data set should be deleted

Screenshots

Desktop (please complete the following information):

• OS: Mac OS
• Zowe Explorer Version: 1.7.1
• (Optional) Zowe CLI Version: 6.19.1
• (Optional) Are you using Secure Credential Store? No
  

Additional context

The integration test "should delete a data set if user verified" in extension.integration.test.ts fails :
https://github.com/zowe/vscode-extension-for-zowe/blob/3a54adcfea4726da3bf5cbc7dbfc8e03e98d49d2/__tests__/__integration__/extension.integration.test.ts#L199-L211

[tucker01]

Getting the same error on Windows 10.