fix: Correct OAuth2 parameter for IAS refresh token workaround

[davidkna-sap]

Context

SAP/cloud-sdk-java-backlog#ISSUENUMBER.

This changes the OAuth2 token request parameter from refresh_token to refresh_expiry for named user current with app_tid to disable refresh token issuance.

The documented approach for disabling refresh token issuance is refresh_expiry=0, but currently refresh_token=0 is set instead. The issue that lead to the workaround being added also talks about refresh_expiry and the API documentation only mentions refresh_expiry.

Feature scope:

• Update parameter being set
• Update existing unit test

Definition of Done

• Functionality scope stated & covered
• Tests cover the scope above
• Error handling created / updated & covered by the tests above
• Documentation updated
• Release notes updated

[thisisjustinm]

Hi @davidkna-sap, small query, with which version will this change be available?

[rpanackal]

LGTM

[thisisjustinm]

Hi @davidkna-sap, small query, with which version will this change be available?

Just rechecking :) @jjtang1985 @rpanackal @davidkna-sap

[MatKuhr]

I also checked again, it seems I copy/pasted the parameter from the wrong teams chat when adding this originally, my bad 😧

Thanks for fixing it!