add menu entry items for how do i articles

Author: elmiko

_howdoi/how-do-i-launch-a-jupyter-notebook.adoc

@@ -1,5 +1,6 @@
 = launch a Jupyter notebook on OpenShift
 :page-layout: howdoi
+:page-menu_entry: How do I?
 
 There are multiple ways to launch a Jupyter notebook on OpenShift with the
 radanalytics.io tooling. You can use the OpenShift console or the `oc` command

_howdoi/how-do-i-recognize-version-clash.adoc

@@ -1,5 +1,6 @@
 = recognize Spark version mismatch between driver, master and/or workers?
 :page-layout: howdoi
+:page-menu_entry: How do I?
 
 It's important that the Spark version running on your driver, master, and
 worker pods all match. Although some versions _might actually_ interoperate,

_howdoi/how-to-connect-to-cluster.adoc

@@ -1,5 +1,6 @@
 = connect to a cluster to debug / develop?
 :page-layout: howdoi
+:page-menu_entry: How do I?
 
 [source,bash]
 oc run -it --rm dev-shell --image=radanalyticsio/openshift-spark -- spark-shell

_howdoi/how-to-connect-to-kafka.adoc

@@ -1,5 +1,6 @@
 = connect to Apache Kafka?
 :page-layout: howdoi
+:page-menu_entry: How do I?
 
 You need to add `--packages org.apache.spark:spark-sql-kafka-0-10_2.11:2.1.0`
 when running `spark-shell`, `spark-submit` or to `SPARK_OPTIONS` for S2I. For

_howdoi/how-to-use-spark-configs.adoc

@@ -1,5 +1,6 @@
 = use custom Spark configuration files with my cluster?
 :page-layout: howdoi
+:page-menu_entry: How do I?
 
 Create custom versions of standard Spark configuration files such as `spark-defaults.conf`
 or `spark-env.sh` and put them together in a subdirectory, then create a configmap

_howdoi/use-python-packages.adoc

@@ -1,5 +1,6 @@
 = install Python packages in Jupyter notebooks on OpenShift
 :page-layout: howdoi
+:page-menu_entry: How do I?
 :source-highlighter: coderay
 :coderay-css: style