Explain how to stop EAP using the CLI

Title: Stop JBoss EAP 6

Describe the issue:
The text does not mention how to stop EAP using the cli.

Suggestions for improvement:
Add a section about shutting down EAP by using the cli ie.

./jboss-cli.sh -c --controller=127.0.0.1:9999 --command=":shutdown()"

as shown in https://access.redhat.com/solutions/179093

Migrated from BZ 1267219.