APY-8 : Implement X-Filter as external server

Updated RBAC structure.
APY-8 : Implement X-Filter as external server

Simplified the call structure to be able to have hints
defined at a latter moment.
APY-8 : Implement X-Filter as external server

Moved all sql alchemy stuff to support plugin.
Merge branch 'apy-8-implement-x-filter' of https://github.com/sourcefabric/Ally-Py into apy-8-implement-x-filter
minor fix