Ignore DataFault incidents count in ref validation

The following line is a frequent cause for reference updates and conflicts in the latter.

DataOnDemandSvc      INFO Handled "DataFault" incidents: 100/0/102551(Alg/Node/Total).

With this MR, changes in the counts will not be considered a failure and will not be part of future committed refs. Given that we are moving away from on demand data creation I think it's fine to ignore this. It may still be an interesting proxy for performance related to TES accesses (it will remain in stdout).

All downstream projects will be affected (assuming tests use the LHCb preprocessor). The line will be removed from references as soon as an update is made (for whatever other reason).