update requirement.txt for NGC Tensorflow 1

Author: hephaex

vendor/ngc-tensorflow/requirements.py36.txt

@@ -199,7 +199,7 @@ jupyterhub==1.4.0
 jupyterhub-jwtauthenticator==0.1
 jupyterhub-kubespawner==0.16.1
 jupyterhubutils==0.25.0
-#jupyterlab==2.3.1
+jupyterlab==2.3.1
 jupyterlab-code-formatter
 jupyterlab-git
 jupyterlab-github
@@ -235,7 +235,7 @@ MarkupSafe
 matplotlib
 mccabe
 mdit-py-plugins
-mecab-python===0.996-ko-0.9.2
+#mecab-python===0.996-ko-0.9.2
 meshio
 mimeparse
 mistune