The number of times we have sent link test packets
to the destination during the current test. This
object will start at zero when the corresponding
instance of hpicfLinkTestStatus is set to 'active'.
It will increment at the completion of each iteration
of the test until either it reaches the value of
hpicfLinkTestRepetitions, or the corresponding
instance of hpicfLinkTestStatus is set to a value
other than 'active'. Note that it is incremented
at the completion of each iteration, not when the
link test packet is sent, so that the number of
failures can be calculated accurately.