Fix to kubectl bash-completion (aws-samples#355)

* fix bash-completion for kubectl

Fixing bash-completion for kubectl, including installing bash-completion into the cloud9 IDE, appending to bashrc and reloading bashrc as part of the build script.

* Fixing typo in bash-completion install

* removing sourcing bashrc

Looks like the IDE will need to be restarted for the for the bash-completion to work.

* Fixing instructions to include IDE restart.

Updating to include a step to restart the Cloud9 IDE terminal to ensure that kubectl completion is fully enabled.

Author: MitchyBAwesome

01-path-basics/101-start-here/readme.adoc

@@ -77,6 +77,8 @@ image:cloud9-run-script.png[Running the script in Cloud9 Terminal]
 [NOTE]
 All shell commands _(starting with "$")_ throughout the rest of the workshop should be run in this tab. You may want to resize it upwards to make it larger.
 
+At this point you can restart the Cloud9 IDE terminal session to ensure that the kublectl completion is enabled. Once a new terminal window is opened, type $ kubectl get nodes.
+
 One last step is required so that the Cloud9 IDE uses the assigned IAM Instance profile. Open the "AWS Cloud9" menu, go to "Preferences", go to "AWS Settings", and disable "AWS managed temporary credentials" as depicted in the diagram here:
 
 image:cloud9-disable-temp-credentials.png[]

01-path-basics/101-start-here/scripts/lab-ide-build.sh

@@ -11,10 +11,13 @@
 # Install jq
 sudo yum -y install jq
 
+# Install bash-completion
+sudo yum install bash-completion -y
+
 # Install kubectl
 curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl
 chmod +x kubectl && sudo mv kubectl /usr/local/bin/
-source <(kubectl completion bash)
+echo "source <(kubectl completion bash)" >> ~/.bashrc
 
 # Install kops
 curl -LO https://github.com/kubernetes/kops/releases/download/$(curl -s https://api.github.com/repos/kubernetes/kops/releases/latest | grep tag_name | cut -d '"' -f 4)/kops-linux-amd64