register query

PercolateTest.java

client.prepareIndex("households", "_percolator", "myQuery")
        .setSource(jsonBuilder()
            .startObject()
                .field("query", constantScoreQuery(filterBuilder()))
                .field("user_id", "123")
            .endObject())
        .setRefresh(true)  // Needed when the query shall be available immediately
        .execute().actionGet();