Modified data schema for optional fields

[antoineludeau]

This PR aims to NOT send to ban API useless information such as default values for :

• "meta" : if no meta information, the "meta" field won't be sent anymore.
• "geometry" : for addresses, geometry is required but for common toponyms, it is not. As a consequence, the "geometry" field won't be sent anymore if no data (ONLY common toponyms)
• "suffix" : for addresses, if no suffix information, the "suffix" field won't be sent anymore.