[keycloak-dev] Initial Client Storage SPI

As part of Openshift integration, I needed to implement a Client Storage SPI. Here are my plans for it: * It is a private SPI * Only read only support. * Only lookup support to facilitate client login and grants and stuff. Listing all clients will not show up in admin conosle * There will be no admin console support. This means, no admin console support for provider config. Providers can only be configured through REST API or realm import. * Basically it will be bare bones to support Openshift integration only. My plan is that Openshift support will be distributed as an extension to our base image and/or, it will be a template realm.json import file that users can edit. I just don't want to expose an unfinished SPI. I'll probably have a PR for review early next week. -- Bill Burke Red Hat