since Starfield test is ported from ruby-saml, apply the same stubbed workaround for invalid XML
since Starfield test is ported from ruby-saml, apply the same stubbed workaround for invalid XML

sportngin/saml_idp,sportngin/saml_idp,18F/saml_idp,18F/saml_idp,18F/saml_idp,sportngin/saml_idp