Christoph Büscher 97c4c43fb7 Make slop optional when parsing span_near query (#25677)
The slop parameter defaults to 0 in the Lucene SpanNearQuery, so we can set it
to this default value also and don't have to require it being specified in the
query when using the Rest API. Leaving `slop` a ctro arg in the Java API as it
should normally be specified and we can keep it `final` that way.

Closes #25642
2017-07-13 09:21:49 +02:00
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