Faulty tests in Transformer2wTypeConverterSpec

[t-ober]

Some of the tests of in the Transformer2wTypeConverterSpec shouldn't pass as the values the actual calculated result is compared against seems to be wrongly parameterized.

For the conductance (gM) the result (as per my pen and paper calculations and implementation of the parameter calculation for the powerfactory2psdm converter) should actually be a third of the noted 2480.5790 nS.

Why do the test pass:

We compare the difference of actual and expected result against the testing tolerance. As we miss to take the absolute value of that difference the tests conveniently still passes when the expected result is much greater than the actual result.