change getHitIds() param from Query to SolrQuery

Query: http://lucene.apache.org/core/old_versioned_docs/versions/3_0_0/api/core/org/apache/lucene/search/Query.html
SolrQuery: http://lucene.apache.org/solr/4_1_0/solr-solrj/org/apache/solr/client/solrj/SolrQuery.html