Fix average returning 1

[adongy]

No description provided.

[Moxie505]

I have this same issue. I just updated to the latest release (d62d5bf) but all my averages are still returning 1

SELECT "net_received_average" FROM "virtualmachine" WHERE "name" = 'xxx' LIMIT 1
name: virtualmachine
time net_received_average

---

1495141203000000000 1

SELECT "mem_usage_average" FROM "virtualmachine" WHERE "name" = 'xxx' LIMIT 1
name: virtualmachine
time mem_usage_average

---

1495141203000000000 1

SELECT "cpu_usage_average" FROM "virtualmachine" WHERE "name" = 'xxx' LIMIT 1
name: virtualmachine
time cpu_usage_average

---

1495141203000000000 1

Thanks for any insight.