Add tests cases to check that in eval mode params stays the same

[iKintosh]

GaborNet/GaborNet/GaborLayer.py

Lines 52 to 60 in a104371

	self.theta = Parameter(
	(math.pi / 8)
	* torch.randint(0, 8, (out_channels, in_channels)).type(torch.Tensor),
	requires_grad=True,
	)
	self.sigma = Parameter(math.pi / self.freq, requires_grad=True)
	self.psi = Parameter(
	math.pi * torch.rand(out_channels, in_channels), requires_grad=True
	)