Tidy up clean-samples.yaml
Tidy up clean-samples.yaml

Improve the readability and use of gabbi to be more in line with
what we've learned since this file was created. The primary changes
are:

* more liberal use of comments and white space for better
  readability
* JSON in the data section
* xfail with link to bugs when there are issues with the HTTP
  handling

The xfail in this case is that when a sample is POSTed there is no
location header in the response.

Change-Id: I6520ea133b3feb9a764b41ecf47bebcc33ca7cb4

redhat-openstack/ceilometer,maestro-hybrid-cloud/ceilometer,pczerkas/aodh,openstack/ceilometer,fabian4/ceilometer,cernops/ceilometer,mathslinux/ceilometer,redhat-openstack/ceilometer,r-mibu/ceilometer,eayunstack/ceilometer,sileht/aodh,ityaptin/ceilometer,ityaptin/ceilometer,isyippee/ceilometer,openstack/ceilometer,eayunstack/ceilometer,r-mibu/ceilometer,pkilambi/ceilometer,maestro-hybrid-cloud/ceilometer,openstack/aodh,pczerkas/aodh,cernops/ceilometer,fabian4/ceilometer,openstack/aodh,chungg/aodh,sileht/aodh,mathslinux/ceilometer,pkilambi/ceilometer,idegtiarov/ceilometer,isyippee/ceilometer,idegtiarov/ceilometer,chungg/aodh