[changelog] updating changelog with gohai, omnibus-software and dd-agent-omnibus milestones.
[changelog] updating changelog with gohai, omnibus-software and dd-agent-omnibus milestones.

takus/dd-agent,cberry777/dd-agent,takus/dd-agent,manolama/dd-agent,jyogi/purvar-agent,manolama/dd-agent,cberry777/dd-agent,manolama/dd-agent,takus/dd-agent,Wattpad/dd-agent,jyogi/purvar-agent,manolama/dd-agent,Wattpad/dd-agent,cberry777/dd-agent,manolama/dd-agent,Wattpad/dd-agent,Wattpad/dd-agent,jyogi/purvar-agent,takus/dd-agent,cberry777/dd-agent,takus/dd-agent,cberry777/dd-agent,Wattpad/dd-agent,jyogi/purvar-agent,jyogi/purvar-agent