cyclades: Fix reconcile for given project

Use the new option 'project' of service_get_quotas in order to retrieve
only the quota needed. Also handle gracefully missing user or project.
cyclades: Set DB index for project fields

The index speeds up resource reconciliation, which filters by project.
cyclades: Auto-fill project in test objects

Use factory.LazyAttribute to set project equal to userid in test objects
created with a factory.
pep8 fixes