[oshdb-filter] handle "other" geometry type occuring as side effect of clipping

[tyrasd]

Bug Description

A geometry:other filter should also select features which became a GeometryCollection as the result of clipping to the area of interest. Currently, it doesn't because the filter pre-selects only relations (e.g. here).

This will also resolve make sure that filtering for (geometry:point or geometry:line or geometry:polygon or geometry:other) will actually select all features.

How to Reproduce

Steps to reproduce the behaviour:

1. Execute the following ohsome API query: https://api.ohsome.org/v1/elements/geometry?bboxes=8.700582,49.4143039,8.701247,49.414994&showMetadata=true&time=2018-01-02&filter=building=*%20and%20geometry:other
2. the result is empty

Expected behaviour

There should be exactly one feature in the result (way/181679235). As produced by https://api.ohsome.org/v1/elements/geometry?keys=building&bboxes=8.700582,49.4143039,8.701247,49.414994&showMetadata=true&types=other&time=2018-01-02

Further Information

Error messages, logs, screenshots

This is the GeometryCollection in question: https://gist.github.com/tyrasd/6ea689b9e0b80fcd43570d12b72263bf

System information

Please complete the following information:

• OSHDB Version: e.g. 0.6.*