New API for instant caching of an image

In Yoga we have added support for caching related operations under V2 API, but still we need to depend on existing periodic job to cache the actual image. This means user/deployer/admin needs to wait until next periodic job to run for caching of an actual image. Even though default time for periodic job is 300 seconds (5 minutes) it may vary deployment wise and the user has to wait until the actual image is cached.