Synnefo

wip Update astakos.im to use local quotaholder

Import directly quotaholder.callpoint in endpoint/qh.py
instead of an HTTP client.
Remove code related to entities, such as registering users and services.
Remove sync_projects logic.

wip Remove check is_active on projects and memberships

Remove second phase of (de)activation, not needed any more,
since syncing to quotaholder will happen in the same transaction
as the call initiating the syncing.

Default quotaholder input to empty list

Keyword arguments in quotaholder calls defaulted to empty pair,
although they were actually expecting a list.

wip New, simplified syncing to quotaholder

Merge Policy model into Holding

Since the removal of quantity, Policy was left with only one value:
capacity. To simplify things, we directly include capacity in Holding.

This makes obsolete the following functions, which are removed:
get_limits, set_limits, get_holding, set_holding.