401 error when opening PDS members after cred change, nested profiles

[traeok]

Describe the bug

In Zowe Explorer v3, 401 errors can occur when opening PDS members after changing your credentials on the associated profile.

Screenshots

To Reproduce

1. Enter a search pattern for one of your profiles with pre-existing, valid credentials in place
2. With the session expanded and data sets listed, right-click on profile node and select Manage Profile -> Update Credentials
3. Enter in invalid credentials for the profile
4. When the "invalid credentials" prompt occurs for the profile, cancel out of the prompt
   a. Notice that the children elements for the profile node are removed
5. Right click on profile node -> Manage Profile -> Update Credentials
6. Enter in valid credentials this time
7. Click on profile node to toggle its collapsible state to expanded
8. Open one of the PDS in the list
9. Click on one of its members

The scenario is a bit niche, but could be reproduced if a user doesn't update their invalid creds right away.

Expected behavior

PDS members should continue to open successfully after credentials are changed for a nested profile.

(applies to ZE v3 only)

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