reduce logging (EmbeddedSolrConnector.query)

mainly to reduce the frequent metadat checks like
> EmbeddedSolrConnector.query QUERY: q={!cache=false raw f=id}xXxXxX&rows=1&start=0&fl=id,load_date_dt
(p.s. direct servlet queries logged via AccessTracker.addToDump)

source/net/yacy/cora/federate/solr/connector/EmbeddedSolrConnector.java

@@ -207,8 +207,7 @@ public class EmbeddedSolrConnector extends SolrServerConnector implements SolrCo
         String threadname = Thread.currentThread().getName();
         String ql = ""; try {ql = URLDecoder.decode(req.getParams().toString(), StandardCharsets.UTF_8.name());} catch (UnsupportedEncodingException e) {}
         Thread.currentThread().setName("solr query: " + ql); // for debugging in Threaddump
-        ConcurrentLog.info("EmbeddedSolrConnector.query", "QUERY: " + ql);
-        //System.out.println("EmbeddedSolrConnector.query * QUERY: " + ql); System.out.println("STACKTRACE: " + ConcurrentLog.stackTrace());
+        ConcurrentLog.fine("EmbeddedSolrConnector.query", "QUERY: " + ql);
         
         SolrQueryResponse rsp = new SolrQueryResponse();
         NamedList<Object> responseHeader = new SimpleOrderedMap<Object>();