Update sgd_solver for LARS

[minkkang]

We change the SGDFusion flow("normalize" -> "GetLocalRate" -> "regularization & update") and the NON-SGDFusion flow("normalize" -> "GetLocalRate" -> "regularization" -> "update") for LARS.

In original intel-caffe code, only SGD(Not NESTEROV, ADAGRAD, RMSPROP, ADADELTA, ADAM) adapted LARS. So, we change only the flow of SGD.

For more information, please refer to #256