Add gabbi tests to cover the SamplesController
Add gabbi tests to cover the SamplesController

The samples controller has only two methods, get_all and get_one. This
new yaml file makes simple queries against a suite of three samples
provided by the SampleDataFixture to validate expected behavior.

Four xfails were required to account for limitations in the framework
that supports the SampleController. Bugs have been linked from the
yaml file.

Change-Id: Ifa90d43cb43bf79c850b4d604d1ddb67a5e06d56

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