Display trust and geo data for compute nodes, instances, and images

With wider cloud adoption, security, compliance, and other requirements demonstrate the need to assert the location of a compute host. Virtual Machine images may likewise contain meta data to indicate compliance requirements such as whether they must be launched on a trusted machine and/or in a particular geo. Displaying in the dashboard the geo and trust status of a compute nodes, of virtual machine instances, and any trust and geo requirements of images would be of value to cloud admins, and users. Original geo-tag wiki: https://wiki.openstack.org/wiki/GeoTagging. Display related proof of concept: https://wiki.openstack.org/wiki/Horizon-geo-trust-display