fix serialization issues with geometry filters
This fixes a bug while running ohsome-api queries on ignite, e.g.
Caused by: org.apache.ignite.binary.BinaryObjectException: Failed to serialize object [typeName=org.heigit.ohsome.filter.GeometryTypeFilter]
…
Caused by: org.apache.ignite.binary.BinaryObjectException: Failed to write field [name=tagTranslator]
…
Caused by: org.apache.ignite.binary.BinaryObjectException: Failed to serialize object [typeName=org.heigit.bigspatialdata.oshdb.util.tagtranslator.TagTranslator]
…
Caused by: org.apache.ignite.binary.BinaryObjectException: Failed to serialize object [typeName=org.postgresql.jdbc.PgPreparedStatement]
(found by @mauer)