Changes to Download account SAML service provider certificate.

the message response property's minLength was decreased from 1 to 0 for the response status 404

the message response property's minLength was decreased from 1 to 0 for the response status 429

the message response property's minLength was decreased from 1 to 0 for the response status 500

api operation id GetServiceProviderCertificateSamlConfiguration removed and replaced with GetSamlServiceProviderCertificateSamlConfiguration

api operation id get/v3/accounts/{id}/saml-configuration/certificate.pem removed and replaced with GetServiceProviderCertificateSamlConfiguration