Remove \Change\Events\EventManagerFactory

Populate application and services on event by new shared listeners with priority (> 9995)
Move DocumentManager in memory documents cache.
Merge pull request #890 from intportg/dev

Discount, fees and credit notes in order process + admin order editor update + misc fixes
Fix SQlite Lock when use SchemaManager
Merge pull request #891 from inthause/documents

Remove \Change\Events\EventManagerFactory