fix(parser): include params in function signature

[rodrigo-brito]

Hi @Mosallamy,

• I fixed the unit tests
• Change the function signatures to include parameters names
• I removed some dead codes

Now the output is:

Refactorings from commit 78491ab088ed6752a8ac32725680e4eb797c8042 1617381042 ----sp
MOVE	{Function printIsEven(self,value) at calculator.py:9}	{Function printIsEven(value) at main.py:5})
Refactorings from commit a60eae5237655a7c0c5bc90918c1778ef23421f6 1617380993 ----sp
RENAME	{Function sum(self,a,b) at calculator.py:3}	{Function summary(self,a,b) at calculator.py:3})
RENAME	{Function mult(self,a,b) at calculator.py:6}	{Function multiply(self,a,b) at calculator.py:6})