[version] beta version bump (0.9.8.beta.1)
[version] beta version bump (0.9.8.beta.1)

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