Prevent high CPU load at startup, caused by the Solr suggester build.

Reported by Collision on mantis 758 (
http://mantis.tokeek.de/view.php?id=758 ).
Introduced by the new YaCy Solr configuration for Solr 6.6.0 (see commit
6fe735945d), including now Suggester
configuration.

defaults/solr/solrconfig.xml

@@ -1032,6 +1032,7 @@
       <str name="field">cat</str>
       <str name="weightField">price</str>
       <str name="suggestAnalyzerFieldType">string</str>
+      <str name="buildOnStartup">false</str> <!-- When unset or set to true, may cause high CPU load at startup or on first requests -->
     </lst>
   </searchComponent>