Update to  clouddocs-maven-plugin 1.12.0

Update to new plugin version

Change-Id: Icb1856f4eefa1ac9801d74bf9bfe44180d138f18
Add openstack-api-site bugs to local-files

Add convenience link to the api bugs

Change-Id: I4d1d1c458edd44a6fd02dc8d34301c3f901b13cf
training guides rescructure continued

update to the preface/start here with trainer class setup sections. building the four node cluster manually is added. scripted build instructions to be added in a later patch.

implements bp/training-manuals

Change-Id: Ie9a055a06756e1f9b77a5397aa01b1411a812b72
Merge "Add openstack-api-site bugs to local-files"
Merge "Update to  clouddocs-maven-plugin 1.12.0"
Merge "training guides rescructure continued"