Also fixed some plumber markdown

Author: djarpin

advanced_functionality/r_bring_your_own/r_bring_your_own.ipynb

@@ -227,9 +227,9 @@
     "\n",
     "\n",
     "#' Ping to show server is there\n",
-    "#' @post /ping\n",
+    "#' @get /ping\n",
     "function() {\n",
-    "    list(status='200', code='200')}\n",
+    "    return('')}\n",
     "\n",
     "\n",
     "#' Parse input and return the prediction from the model\n",
@@ -268,7 +268,7 @@
     "```Dockerfile\n",
     "FROM ubuntu:16.04\n",
     "\n",
-    "MAINTAINER David Arpin <arpin@amazon.com>\n",
+    "MAINTAINER Amazon SageMaker Examples <amazon-sagemaker-examples@amazon.com>\n",
     "\n",
     "RUN apt-get -y update && apt-get install -y --no-install-recommends \\\n",
     "    wget \\\n",
@@ -597,7 +597,7 @@
    "source": [
     "iris = pd.read_csv('iris.csv')\n",
     "\n",
-    "runtime = boto3.Session().client('sagemaker-runtime')\n",
+    "runtime = boto3.Session().client('runtime.sagemaker')\n",
     "\n",
     "payload = iris.drop(['Sepal.Length'], axis=1).to_csv(index=False)\n",
     "response = runtime.invoke_endpoint(EndpointName=r_endpoint,\n",