ENH: Added call to Print() method

Attempt to improve the code coverage for itk:SigmoidTransferFunction and
itk::LogSigmoidTransferFunction classes by calling the objects' Print()
method.

Change-Id: I916396f82113d572187f3e405716a9bd753a2567
STYLE: Changed LogSigmoidTransferFunction template argument names.

The itkLogSigmoidTransferFunction template argument names were changed in
order to keep a better coherence with the rest of ITK, and also the recent
changes in the SigmoidTransferFunction class in this regard.

Change-Id: I2c5e1e3d0a8164fc34eebeeb2cf3ec6a17b0eca9
Merge topic 'enhNNTransferFunctionCoverage'

390a8956 ENH: Added call to Print() method
Merge topic 'logSigmoidTemplateArgNames'

c3ae788f STYLE: Changed LogSigmoidTransferFunction template argument names.