This commit updates the Django dependency version to 1.9.2 and gvacommon
to 0.3.0 that provides gvacommon.settings_utils.get_env_variable. The
gnuviechadmin.settings.base module now uses this implementation instead
of an own copy and the corresponding test has been removed too.
The previously used amqp result backend has been marked as deprecated by
the celery developers. This commit switches to the rpc backend that
should be used instead.
This commit renames get_env_setting to get_env_variable to be consistent
with the gva settings modules.
- add celery application code in gvaldap.celery
- add osusers app to mimic the osusers code in the main gnuviechadmin code
- add celery configuration settings to gvaldap.settings.base
- add osusers.models.Group and osusers.models.User
- add osusers.tasks.create_ldap_group and osusers.tasks.create_ldap_user
- add billiard, kombu and pytz to requirements/base.txt