[config-checks] don't fail to start if there is no checks key
[config-checks] don't fail to start if there is no checks key

bf4/sensu,npe9/sensu,yonglehou/sensu,m4ce/sensu,quodlibetor/sensu,portertech/sensu,zuazo-forks/sensu,sensu/sensu,pauloconnor/sensu,javrasya/sensu,roobert/sensu,miyakawataku/sensu,crewton/sensu,cread/sensu,rbramwell/sensu,upfluence/sensu,keymone/sensu,Tapjoy/sensu-mirror,solarkennedy/sensu,somic/sensu,withnale/sensu