Update hash_value

[billingsley-john]

hash_value is currently calculated individually for each parametric_shape by specifying each parameter individually. This needs to be changed so that the get_hash method calculates the hash_value by automatically detecting the class parameters

[billingsley-john]

UPDATE: hash_value can be calculated using self._dict_.values(). Note - _solid and _hash_value must not be calculated as part of the hash to prevent constant reconstruction.
This works well for parametric_shapes but there is a BUG when this propagates to parametric_components.

EXPECTED:

• On first call of shape.solid, create_solid() should be called.
• On second call of shape.solid, create_solid() should NOT be called IF no parameters have changed.

ACTUAL:

• On first call of shape.solid, create_solid() is called. (EXPECTED)
• On second call of shape.solid, create_solid() called again, despite no parameters being changed. (UNEXPECTED)
• On third call of shape.solid, create_solid() is not called. (EXPECTED)

REASON:

• shape.points = None upon class initialization/construction
• First call of shape.solid doesn't seem to update shape.points correctly for the hash calculation
• Therefore, second call of shape.solid compares new calculated points to None.
• I.e. the point at which points is calculated in the solid construction chain and the point where the hash is calculated causes this issue.

[billingsley-john]

FIX: Move hash_value calculation to AFTER solid construction. This allows shape.points to be populated correctly before the hash_value for the new solid is calculated.