fixes #812 - new permissions model, user group role and nest support, role filters for better granularity
fixes #4222 Add capability to compute resource API to retrieve cluster,network,storage info on oVirt
fixes #3925 - create apipie param_groups for API v2 to DRY documentation
fixes #3760 - API v2 define metadata @total for each controller
fixes #3017 - split APIv2 controllers from v1 parents
fixes #3101 - list available images for CRs, add iam_role field to images API
fixes #2239 API v2 CRUD for locations and organizations and added nested loc/org