Fix Matrix python swig

This fixes an issue with "__setitem__" in python swig of Matrix. This
fixes…

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "openstudioutilitiesdata.py", line 4094, in __setitem__
    return _openstudioutilitiesdata.Matrix___setitem__(self, *args)
TypeError: Matrix___setitem__() takes exactly 4 arguments (3 given)

in the following python code

m = Matrix(4,4,0)
m[0,0] = 1
Make Matrix swig python fix only for Matrix class
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Merge pull request #552 from ORNL-BTRIC/fix_matrix_python

Fix Matrix python swig