TESTS: Added overloads for some comparison functions

In a few tests, comparison of two vectorized Sample type are required.
They are added here, for testing purpose only.

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
TESTS: Removed irrelevant comments

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
TESTS: Fixed a few Vca tests for vectorized Sample type use

The previous version were not compiling when Sample is not a float.
This has been fixed by using the previously created comparison
functions overloads.

Signed-off-by: Gama <misept.dieseneuf@gmail.com>
MODULATORS: Fixed Adsd Python prototype/C implementation differences

There was slight differences between prototype and actual implementation.
They are fixed here but reveal new issues.

Signed-off-by: Gama <misept.dieseneuf@gmail.com>