[swarming] Accelerate rebuild-task-cache queue
[swarming] Accelerate rebuild-task-cache queue

There's a 1300+ items backlog on rebuild-task-cache queue due to an
internal quota failure. Accelerate it to churn through backlog.

Bug: 939204
Change-Id: Ia8fa64726893e719d2ca119147fed10f245c7279
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-py/+/1514999
Auto-Submit: Marc-Antoine Ruel <d2bf0fc09b08f7b0888b3ddab32b3e89c7122c8b@chromium.org>
Reviewed-by: Quinten Yearsley <747cf52e0cef2e3e9371802a2d344b6c87126a4b@chromium.org>
Commit-Queue: Marc-Antoine Ruel <d2bf0fc09b08f7b0888b3ddab32b3e89c7122c8b@chromium.org>

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py