Fix HOT glossary entry, add CFN entry
Fix HOT glossary entry, add CFN entry

Do not use glossentry inside the glossary. Instead cross-reference via
the index.
Add entry for AWS CloudFormation template.

Change-Id: I43956404f800587ea55a6562b31adf4e600dbce8

AlekhyaMallina-Vedams/openstack-manuals,saeki-masaki/openstack-manuals,saeki-masaki/openstack-manuals,potsmaster/openstack-manuals,openstack/openstack-manuals,potsmaster/openstack-manuals,gongysh2004/openstack-manual,gongysh2004/openstack-manual,openstack/openstack-manuals,Akasurde/openstack-manuals,openstack/openstack-manuals,kairoaraujo/openstack-manuals,kairoaraujo/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,Akasurde/openstack-manuals