List valid Job categories
Returns every Job category id/name pair valid for POST/DELETE
/api/v1/requirements/{guid}/categories/{categoryId}.
A value returned here is always accepted as categoryId on that endpoint.
Authentication
X-Brightmove-Company-ApiKeystring
BrightMove Company Api Key
X-Brightmove-User-ApiKeystring
BrightMove User Api Key
Response
Job categories returned