Apex Not Found. Provided solution does not solve. 
**The bug**

Megatron GPT training requires NVIDIA Apex to be installed. Token_Classification-BioMegatron.ipynb does not import module and provided solution found through (Error(s): Apex was not found. Please see the NeMo README for installation instructions: https://github.com/NVIDIA/NeMo#megatron-gpt.) does not solve import error. 

**To reproduce bug**

Run script through google colab as presented on Nvidia nemo tutorials or through provided github. Notebook will error out at line 25 when model is initialized. Follow steps listed in error messaging to attempt to correct error. 

**Expected behavior**

Notebook will error out at line 25 when model is initialized and return "Error(s): Apex was not found. Please see the NeMo README for installation instructions: https://github.com/NVIDIA/NeMo#megatron-gpt."

**Environment overview (please complete the following information)**

 - Environment location: Colab
 - Method of NeMo install: 
 !python -m pip install git+https://github.com/NVIDIA/NeMo.git@$BRANCH#egg=nemo_toolkit[nlp]
from nemo.collections import nlp as nemo_nlp
from nemo.utils.exp_manager import exp_manager
import os
import wget 
import torch
import pytorch_lightning as pl
from omegaconf import OmegaConf

**Environment details**

- OS version: posix
- PyTorch version: 1.12.1+cu113
- Python version: Python 3.7.14

**Additional context**

Standard GPU selection on Colab

**Screen capture after implementing official solution**
![BioMeg_ModuleNotFound_10_2022](https://user-images.githubusercontent.com/107068406/194599521-9837f3f4-3aaa-44c5-ba34-a216ce94c2db.png)

