fix when running the script more than once, force drop the DB
fix when running the script more than once, force drop the DB

Star2Billing/cdr-stats,areski/cdr-stats,areski/cdr-stats,Star2Billing/cdr-stats,areski/cdr-stats,Star2Billing/cdr-stats,areski/cdr-stats,cdr-stats/cdr-stats,cdr-stats/cdr-stats,cdr-stats/cdr-stats,Star2Billing/cdr-stats,cdr-stats/cdr-stats