Add new attributes to initializing in AttributesManagerImpl

- add new attribute initializing vo_core_createdAt
- add new attribute initializing group_def_lastSynchronizationState
- add new attribute initializing group_def_lastSynchronizationTimestamp
- add all setDisplayName parts
- add some setDescription parts
Merge pull request #421 from stavamichal/addAutocreatingOfVoCoreAttributeCreatedAt

Add new attributes to initializing in AttributesManagerImpl