SAML2 provider - can't configure repeated_id_ttl and clock_skew

[rgergo67]

The documentation says that validation.repeated_id_ttl and validation.clock_skew can be configured, however the provider does not load them from the servides.php config.

They are neither listed in additionalConfigKeys() function in the Provider.php

[atymic]

Feel free to PR a fix.

[stale]

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