[TFLite Export] Add variable, functions TfOpNodes for Fused OP export

[TFLite Export] Add variable, functions TfOpNodes for Fused OP export
for Export Tflite format with Fused Op add some Variable and Function

1. Add getter, setter, replace to weights
- for Fused Op we need to adjust weights after made Opnode

2. Add isToBeRemove variable
- After made Opnode, check condition and mark as to be remove

3. Add additional_props
- for BatchNormalization Fused Op we need additional props from nntrainer
- made vector<float> variable for save additional data

Signed-off-by: DongHak Park <donghak.park@samsung.com>