Document using cURL for testing z/OSMF REST APIs

[ghost]

As a Zowe CLI user who invokes commands that call z/OSMF REST APIs, I want documentation about how to test the APIs with cURL as a troubleshooting step, so that when a CLI command fails with a REST API error I can determine whether the problem lies with z/OSMF or Zowe CLI.

Additional info:

• Postman/Postwoman is also an option, but likely involves installing and getting acquainted with a new app.
• We can link to the z/OSMF REST API docs here.
• The website https://curlbuilder.com/ can be used to construct cURL commands with the appropriate REST endpoint, request body, and headers.
• We can document some cURL flags:
  • -u <user>:<password> - for supplying authentication to REST API
  • --insecure - equivalent to the CLI option "rejectUnauthorized = false"
  • -v - much more verbose output

[anaxceron]

Closed w/ PR 2612

[anaxceron]

Closed w/ PR 2612