- createRealestate(String username, RealEstate realestate) uses energy
certificate data by default
- update realeste 
- upload of FileMultimediaObject now throw
MaximumNumberOfAttachmentsReachedException when trying to upload
attchment #31
- user can retrieve realestate project for a given realestate id
- realestate projects can be upated
- several methods to add realestates to a realestes projects were
introduced
- realestates can be deleted from realestate projects
- On top products can be placed on realestates
- user can retrieve a list of on top products placed an a specific
realestate
- On top products can be removed from realestates
- user can get a list of entitlements for a given username
- user can get a specific entitlement by name for a given user