title: Changing configuration's maxBooleanClauses has no effect
body: <p>I'm upgrading from an old SOLR into SOLR 6. Installed version 6 on my local computer and started playing around to see how our old system copes with the new SOLR.</p>
  
  <p>I have an old system that sometimes uses a lot of boolean clauses within a query. Yes, it would be best to upgrade it to query differently, but this is not doable currently.</p>
  
  <p>I'm supposed to be able to change the maximum amount of boolean clauses via the <code>maxBooleanClauses</code> attribute in solrconfig.xml , but changing it has no effect. I set the same value (102400) to all (2) of my cores. The exception still says <code>Caused by: org.apache.lucene.search.BooleanQuery$TooManyClauses: maxClauseCount is set to 1024</code>.</p>
  
  <p>What I've tried:</p>
  
  <ul>
  <li>Reload all cores</li>
  <li>Unload all cores, and reload with <code>http://localhost:8983/solr/admin/cores?action=CREATE&amp;name=Companies&amp;instanceDir=C:\temp\solr\solr-6.0.0\server\solr\Companies</code></li>
  <li>Unload all cores and reload only one</li>
  </ul>
  
  <p>Browsing the admin UI to Core Selector -> name -> Files -> solrconfig.xml shows the right value (102400).</p>
  
  <p>Any ideas? Thanks! :)</p>