switch from "/spell" to "/select" Solr request handler #4158

Back in 60e640b when I was playing with spelling suggestions from Solr I
changed the request handler from "/select" (the default) to "/spell". We
didn't have time to fully explore the spelling suggestions feature of
Solr during the 4.0 rewrite and the "/spell" request handler seems to be
leading to other bugs, such as not being able to search on the
"identifier" portion of a DOI (i.e. "JNIUOA") from basic search. In
short we are switching to the default request handler for Solr,
something I would have done before tagging 4.0 if I had realized I had
left the "/spell" request handler in there.

src/main/java/edu/harvard/iq/dataverse/search/SearchServiceBean.java

@@ -205,7 +205,7 @@ public SolrQueryResponse search(DataverseRequest dataverseRequest, Dataverse dat
             solrQuery.addHighlightField(solrField);
         }
         solrQuery.setParam("fl", "*,score");
-        solrQuery.setParam("qt", "/spell");
+        solrQuery.setParam("qt", "/select");
         solrQuery.setParam("facet", "true");
         /**
          * @todo: do we need facet.query?

src/test/java/edu/harvard/iq/dataverse/api/SearchIT.java

@@ -627,10 +627,7 @@ public void testIdentifier() {
         searchUntargeted.prettyPrint();
         searchUntargeted.then().assertThat()
                 .statusCode(OK.getStatusCode())
-                // FIXME: Why can't we find the dataset based on just its identifier (basic search)?
-                // Oddly, you *can* find from Solr directly: curl 'http://localhost:8983/solr/collection1/select?rows=1000000&wt=json&indent=true&hl=true&hl.fl=*&q=JNIUOA'
-                // Under "highlighting", you see "dsPersistentId":["doi:10.5072/FK2/<em>JNIUOA</em>"]
-                .body("data.total_count", CoreMatchers.equalTo(0));
+                .body("data.total_count", CoreMatchers.equalTo(1));
 
     }