fix(ftp/ds): ECONNRESET FTPS error for empty dataset contents

[traeok]

Proposed changes

When trying to upload or create an empty data set member in an FTP profile while secureFtp is enabled, an ECONNRESET error occurs from the FTP client that zos-node-accessor uses. This PR avoids this error by substituting blank contents with a single space.

See zos-node-accessor/#93 for more info.

Release Notes

Milestone: 2.12.0

Changelog:

• Fixed ECONNRESET error when trying to upload or create an empty data set member over FTPS. Frequently unable to create a new PDS member using the FTP Plugin in VSCode #2350

Types of changes

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• Bugfix (non-breaking change which fixes an issue)

Checklist

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• I have read the CONTRIBUTOR GUIDANCE wiki
• PR title follows Conventional Commits Guidelines
• PR Description is included
• gif or screenshot is included if visual changes are made
• yarn workspace vscode-extension-for-zowe vscode:prepublish has been executed
• All checks have passed (DCO, Jenkins and Code Coverage)
• I have added unit test and it is passing
• I have added integration test and it is passing
• There is coverage for the code that I have added
• I have tested it manually and there are no regressions found

[codecov]

Codecov Report

Patch coverage is 100.00% of modified lines.

❗ Current head 845e7d3 differs from pull request most recent head 3e24aab. Consider uploading reports for the commit 3e24aab to get more accurate results

Files Changed	Coverage
...xplorer-ftp-extension/src/ZoweExplorerFtpMvsApi.ts	100.00%

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[JillieBeanSim]

Thanks for the fix @traeok

[traeok]

Turns out that this fix is only needed if secureFtp is enabled for a specific profile. I've adjusted the logic so we only use this fix if secureFtp == true.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[t1m0thyj]

LGTM, thanks @traeok!

I don't think its related to this PR, but when testing the FTP extension I saw this popup several times. Is anyone else seeing this behavior?