[milo] fix missing analytics module initialisation
[milo] fix missing analytics module initialisation

This is causing the server failing to start in the -dev environment.

R=mwarton, orodley

Bug: 1258632
Change-Id: Ia704d978ce7312a1989337d9e667e45573fb7bde
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/3218801
Reviewed-by: Owen Rodley <ac3ca500c35ad8417cba974d309c69594f145e39@chromium.org>
Commit-Queue: Weiwei Lin <968518a24f41fef00b747498600e52b792d06ae0@google.com>

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