Update server-plugins-api.yaml to fix query parameter

[kirkster96]

Proposed changes

I am running Zowe 2.15.0 on z/OS using the .pax convivence build.

I noticed that the sample apps where already provided and fully built in the .pax

I was trying to use the Installing Plugins By REST API

I discovered that the Swagger "Try it out" wasn't working for me.
Here is a screenshot of what happened:

I looked into this deeper and came across this section of javascript:
https://github.com/zowe/zlux-server-framework/blob/7252bc103f09b6ae4f237fbb2412dfabfd0d8518/lib/webapp.js#L770

I believe that the request query parameter should say:

?path= ✅

instead of

?plugin%20location= ❌

I tested this from Postman and it worked!

I think this is a mistake in the swagger doc..

This PR addresses Issue: [Link to Github issue within https://github.com/zowe/zlux/issues if any]

This PR depends upon the following PRs:

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Change in a documentation
• Refactor the code
• Chore, repository cleanup, updates the dependencies.
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

PR Checklist

Please delete options that are not relevant.

• If the changes in this PR are meant for the next release / mainline, this PR targets the "staging" branch.
• My code follows the style guidelines of this project (see: Contributing guideline)
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• New and existing unit tests pass locally with my changes
• video or image is included if visual changes are made
• Relevant update to CHANGELOG.md
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works, or describe a test method below

Testing

Further comments

I wonder if there is a way to automatically test when the server spec matches the server implementation?

[kirkster96]

I am also noticing that the DELETE method does not work as documented...

Here is the Swagger UI "Try it out" failing with incorrect request URL and parameters:

Here is the HTTP DELETE method correctly working in Postman:

I am not sure how to easily correct this in my Pull Request and an issue might need to be opened about this..