Setup for openstack-doc-tools

Setup repository so that we can gate using the openstack-doc-tools
tools. Update documentation with details.

Change-Id: I54cf9443eb154f3b06d0412cf5641ffb5254579b
Fix XML validation

Remove text from XML file. No other samples files contains these
HTTP headers - and it's not valid XML in the file.

Change-Id: Idef1899300eb6c2083d2b8ac490775550f3f1b32
Merge "Setup for openstack-doc-tools"
Merge "Fix XML validation"