Cloned from launchpad blueprint https://blueprints.launchpad.net/horizon/+spec/trove-metadata-support. Description: There is a new Trove feature currently in development that will allow the user to attach arbitrary metadata to a trove instance. See https://blueprints.launchpad.net/trove/+spec/trove-metadata This blueprint is to add support for trove metadata to the horizon dashboard. In particular we will add: 1. View metadata associated with an instance on the Instance Details page. 2. Add a new key / value pair of metadata to a trove instance 3. Edit the values for trove metadata 4. Delete metadata key / value pairs from a trove instance Specification URL (additional information): None