Make install_r_notebook compatible with SageMaker Notebook Instance

* Use the Python3 kernel when installing R, aince we've hidden the
  JupyterSystemEnv "kernel", specify a working Kernel.
* Install R Kernel in the environment where Jupyter sits.  Jupyter
  runs in a "pristine" Conda environment which isn't affected by
  changes in the root environment.  As a result, modifications to
  Jupyter (kernels, extensions, etc.) must be installed there too.

Author: mckev-amazon

advanced_functionality/install_r_kernel/install_r_kernel.ipynb

@@ -15,7 +15,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "!conda install -y -c r r-essentials"
+    "!conda install --yes --name JupyterSystemEnv --channel r r-essentials"
    ]
   },
   {
@@ -27,11 +27,10 @@
   }
  ],
  "metadata": {
-  "notice": "Copyright 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.  Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with the License. A copy of the License is located at http://aws.amazon.com/apache2.0/ or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.",
   "kernelspec": {
-   "display_name": "Environment (conda_jupytersystemenv)",
+   "display_name": "conda_python3",
    "language": "python",
-   "name": "conda_jupytersystemenv"
+   "name": "conda_python3"
   },
   "language_info": {
    "codemirror_mode": {
@@ -43,8 +42,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.3"
-  }
+   "version": "3.6.2"
+  },
+  "notice": "Copyright 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.  Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with the License. A copy of the License is located at http://aws.amazon.com/apache2.0/ or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License."
  },
  "nbformat": 4,
  "nbformat_minor": 2