Milo: Enbiggen instance size
Milo: Enbiggen instance size

The smaller instance size has trouble with processing large amounts (16mb) of logs.

BUG=
TBR=estaab

Review URL: https://codereview.chromium.org/1868033002

luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go