fixed a name bug for search_core/search_query in exists_in_solr function
fixed a name bug for search_core/search_query in exists_in_solr function

qzzhang/KBSolrUtil,qzzhang/KBSolrUtil,qzzhang/KBSolrUtil,qzzhang/KBSolrUtil,qzzhang/KBSolrUtil,qzzhang/KBSolrUtil,qzzhang/KBSolrUtil