Complete pyfaust.factparams unit tests of projectors (spcol, splincol,...

Complete pyfaust.factparams unit tests of projectors (spcol, splincol, normcol, normlin, supp, const).

splincol is not fully tested because it's complicated to define properties to verify.
positivity is not tested too and normalization not totally.

Minor unrelated changes: delete commented code in GivensFGFT/GivensFGFTComplex classes (due to refactoring done in the previous commit).