switched _addXML2Solr to _addJSON2Solr in index_in_solr method
switched _addXML2Solr to _addJSON2Solr in index_in_solr method

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