check if mongo is installed before install
check if mongo is installed before install

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