similarity factory config

schema.xml

 <similarity class="org.ads.solr.CustomSimilarityFactory"> 
    <lst name="body">
        <int name="min">500</int>
        <int name="max">10000</int>
        <float name="steepness">0.5</float>
    </lst>
    <lst name="body_syn">
        <int name="min">500</int>
        <int name="max">20000</int>
        <float name="steepness">0.5</float>
    </lst>
 </similarity>