Training Guides: Fix glossterm usage
Training Guides: Fix glossterm usage

There's no entry in the glossary for guest or host, remove
glossterm markup.

Change-Id: I6968bc683daa89f3e880dc4431ccf3ab57c9e867

Nabs007/training-guides,openstack/training-guides,harrisonfeng/training-guides,harrisonfeng/training-guides,Nabs007/training-guides,Nabs007/training-guides,openstack/training-guides,harrisonfeng/training-guides