adding a espilon value in LayerNorm in GraphSAGE model

[thegodone]

In version kgcnn 3.1, I've got a strange error related to this error tensorflow/tensorflow#62607

Is it possible to set or expose in the configs layernorm epsilon parameter in order to change it dynamically in GraphLayerNorm and LayerNorm ?

No registered '_MklLayerNorm' OpKernel for 'GPU' devices compatible with node {{node model/graph_layer_normalization/layer_normalization/add}}
. Registered: device='CPU'; T in [DT_BFLOAT16]
device='CPU'; T in [DT_FLOAT]

 [[model/graph_layer_normalization/layer_normalization/add]] [Op:__inference_test_function_10733]

and in GraphSage can we set the epsilon to 1e-5 or 1e-7 ?