Project: usergrid
Issue USERGRID-545: Endpoint for checking storage consumed
As we move to separate keyspaces for each tenant we need to have an endpoint to monitor storage consumed for the keyspace. This will be followed by the ability to show data consumed in the console and notifications when storage consumed is at X%. 1. add size to entities 2. add size to index. 3. migrate field mapping in index 4. add endpoint for getting storage by app api is management/orgs/orgname/applications/appname/size or management/orgs/orgname/applications/appname/size/collectionName
Story points: 3