Changes to Create an export job with schema

added subschema #1 subschema #2 to the response body oneOf list for the response status 400

the response's body type changed from object to no type for status 400

removed the request property filters/agent_id

removed the request property filters/app_id

removed the request property filters/run_id

removed the request property filters/user_id

removed the optional property message from the response with the 400 status