Fixes #6532 - permission related api extensions

- usergroups#show lists associated roles
 - listing available resource types
 - filters#show lists associated roles
 - filters#index lists associated roles and permissions and orders the results
 - pagination in permissions#index...

Fixes #6285 - Settings API does not parse incoming values to correct data type

fixes #3272 - allow 'admin' account to be removed and replaced

fixes #6248 - API V2 return object for POST/PUT/DELETE should not include root node

fixes #6216, #4416 - avoid foreign key errors when deleting some objects in use

fixes #6229 - validate installation media exists for new host if pxe_build

fixes #6003 - don't render user default loc/org object directly

fixes #5722: VM-based host cloning picks up existing compute attributes

fixes #4250 - API v2 - add compute profiles

fixes #5612 - use correct permissions for authz in parameters API