SOLR-2452: rename Clover coverage db filename to be the same as Lucene's - because of Lucene compilation called from Solr, Clover's db filename doesn't stay named as solr_coverage.db
SOLR-2452: rename Clover coverage db filename to be the same as Lucene's - because of Lucene compilation called from Solr, Clover's db filename doesn't stay named as solr_coverage.db

git-svn-id: 308d55f399f3bd9aa0560a10e81a003040006c48@1144862 13f79535-47bb-0310-9956-ffa450edef68

cscorley/solr-only-mirror,cscorley/solr-only-mirror,cscorley/solr-only-mirror