Problem description
Modifications proposed for our API:

• Align error definition with commonalities/CAMARA_common.yaml to enforce the error code.
  This change will not break backward compatibility.
• Remove 500 & 503 errors from the yaml as stated here: Enhancements and Alignments in Errors Commonalities#321 (comment)
• Add error 429 as mandated in design guideline

Expected behavior
Update the yaml

Alternative solution

Additional context
@jgarciahospital happy to do it !