unique_together integration in CW (alf+syt) * added in-DB representation of the constraint with a new entity type (CWUniqueTogetherConstraint) * the schema is now migrated on a sync_schema_props_perms(EType) call in the migration script * removed the migration commands provided in the first implementation

if versions_map['cubicweb'][0] == (3, 7, 4):
    config['http-session-time'] *= 60
    config['cleanup-session-time'] *= 60
    config['cleanup-anonymous-session-time'] *= 60