Type labels

Updated naming of labels such that JDBC returns our type labels instead of Postgres type labels when using rs.getMetaData.getTypeName().

Some types remain special:
- Due to the OID type central approach of our JDBC driver Decimal was resolved to a Unsigned Bigint as this uses the same oid value, this is fixed by 'order by clause' in TypeInfoCache#createFDBNameStatement(). 
- uuid/GUID is only available from jdbc3g, and is handled at the original location. A major clean-up of the JDBC driver would be nice, removing all facilities for postgres compatability. 
- json type (oid = 114) would not be resolved in the standard manner, but is necessary for output format json, new type resolving would fails if output format is set to json.




Nowhere calls this new method. Intentional?