GitLab

 - Split code that lists and syncs quotas
 - Merge the latter with qh_sync_users
 - Move qh_sync_projects in quotas.py; sync only active members
 - Add missing select for update in project suspend
 - Clean up quotas.py

Available join and leave policies are internally defined and should
not be changed by settings. Move policy descriptions to presentation.py.

Do not convert to string the lookup key in templatetags/filters.py

Remove project_tests.py, empty package im.endpoints and fixtures

Implement 'join_urls' method for joining a base URL with a path,
without worrying about redundant or missing "/". Do not use
'urlparse.urljoin', since it has different semantics.

``/astakos/api/authenticate`` call
does not include any more resource usage in the reply.
(``usage`` request parameter has become obsolete)
The services in order to get the resource usage should call
``/astakos/api/quotas`` instead.

Also replace `quotas' with `quota' in strings and command line options.

Replace `available' with `usage' and `limit' in NoQuantityError
to make it similar to NoCapacityError.

To change base quota for a specified user:
  snf-manage user-modify user --set-base-quota resource limit

To import base quota in batch from a file:
  snf-manage astakos-quota --import-base-quota filename

Rename `initial' to `base quota' in command output.
Move code that creates/removes AstakosUserQuota entries in file quotas.py;
sync user to quotaholder after such a change.

Refs #3411

Refs #3530

Use the same utility function as astakos-quota. Update the latter
to a SynnefoCommand.

Refs #3717

Replace instances of DateField in ProjectMembership and
ProjectMembershipHistory.

This reverts commit 7ce770be9fd9668fff4088eff2421cbeb0cc311e.

Update astakos tests to use membership id.

If option parameter ``usage`` is passed then the response should
contain also the resource presentation information
(as it used to be in the past)

Replace all AstakosCallpoint references

User request.user field (set by user_for_token decorator)

user_for_token after successful user authentication
sets the request user attribute
The wrapped methods no more need the ``user`` argument:
they can get the token holder by the request object

Refs: #3340

Fix race condition in one of Astakos tests.

Do not user 'assertItemsEqual' method of unittest is only supported in
python 2.7.

Also, some arguments have been renamed.

Search based on 'person__id' and not 'id'.

add_member, remove_member were not used.

Always return services that exist in database. If a known service exists
use the predefined presentation data as base dict upon which we build up
the returned info by merging the data stored in service model and the
ASTAKOS_SERVICE_META entry if exists for the corresponding service.

using basestring also handles unicode objects

For cancel and dismiss, it is for now just a placeholder.