WFLY-285 Add support for clustered database timers
[WFLY-3269] : Making force attribute optional with default value 'false' as it is defined in the XSD.
Merge pull request #6345 from stuartwdouglas/clustered-timers

WFLY-285 Add support for clustered database timers
Merge pull request #6394 from ehsavoie/WFLY-3269

[WFLY-3269] : XML parsing mandating the 'force' attribute on username-to-dn even though it has a default value.