Minor change to section_cli_nova_boot.xml file

fixed period after example , added commas

Change-Id: I191fb59c83fa91cd94daa9c98714224a08f9794b
Made a small change to section_keystone_certificates-for-pki

Copy edit change - Changed successfully to successful

Change-Id: I4a997b7b3393180b75bb6517a5fe078dfccb4a57
Merge "Made a small change to section_keystone_certificates-for-pki"
Merge "Minor change to section_cli_nova_boot.xml file"