forbid arument duplications

Currently we allow function to pass the same argument as a positional and a keyword argument. So we allow, something like:

qc.interpolateIndex("data", "10Min", freq="10min", method="linear")

The second positional argument to interpolateIndex is called freq. Instead we now fail with:

TypeError: SaQC.interpolateIndex() got multiple values for argument 'freq'

as Python function usually behave.

changed milestone to %2.4.0

added BUG category: register/core labels

requested review from @palmb

assigned to @schaefed

approved this merge request

resolved all threads

merged

mentioned in commit 14af2ac7