Better input validation on HMASynthesizer.sample

[npatki]

Version: SDV 1.0.0 (in progress)

Problem Description

In this version, the HMASynthesizer will have a parameter, scale that controls how large to make the synthetic data. It should only be possible to input floats or integers that are >0.0.

However, we are currently accepting other inputs such as True, False, '1', etc. -- we are actually producing synthetic data for this, even though it's unclear what the parameter value really means.

Expected behavior

Throw an error if the scale parameter is not an integer or float that is >0.0.

>>> synthesizer.sample(scale=True)

SamplingError: Invalid parameter for 'scale' (True). Please provide a number that is >0.0.

Same error should be thrown if the user provides a negative number.