Problems with unit comparison of "equal units"

[t-ober]

In 78c168d when comparing values of kind:

      actual.getgM() should equalWithTolerance(
        Quantities.getQuantity(826.44628, MetricPrefix.NANO(SIEMENS))
      )

We got failing tests, even though they shouldn't.

The problem of the test failing was the unit even though it was of unit nano Siemens.
Looking into the unit actual had a noted symbol attribute while expected didn't.
I suspect that it has something to do with the StandardUnits.

In any case this comparison should work. Find out what this is about

[t-ober]

Moved to ie3-institute/simBench2psdm#138