Defines EndpointType as defined by
https://www.oasis-open.org/committees/download.php/35391/sstc-saml-metadata-errata-2.0-wd-04-diff.pdf
Page 9, Line 294
Endpoint() - Constructor for class org.springframework.security.saml.saml2.metadata.Endpoint
Defines EntityDescriptor as defined by
https://www.oasis-open.org/committees/download.php/35391/sstc-saml-metadata-errata-2.0-wd-04-diff.pdf
Page 13, Line 268