IR Tempest 16/train support
IR Tempest 16/train support

2ebdfc92d99a03ff0fe3522bb8daee30647b6da6 was forget about the
tempest plugin. adding train as a supported version
to the tempest plugin.

Change-Id: Iea9410c79aa463544249ac573ca9fb1b42818ebf

redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared