Indicates the number of errors which occurred during the
current or most recent running of a test. This Gauge is reset
to zero each time a test starts (e.g., when ccdPrbsIfAction
is set to 'start') or each time ccdPrbsIfAction is set
to 'errorReset' on an interface.
If and when an instance of ccdPrbsIfTestErrors reaches its
maximum value as indicated by the corresponding instance of
ccdPrbsIfTestErrorsMaxValue, its value will be less or equal
to the actual number of errors.