Trim user from termination task
Trim user from termination task

The authenticated user is not meant to be copied to the user field.

R=7cdab2cfab351f23814786ba39716e90eed69047@chromium.org
Bug:759851
Change-Id: I9349503093b855896842ab0e8c2ac6244899fcb7
Reviewed-on: https://chromium-review.googlesource.com/642117
Reviewed-by: Kevin Lubick <7cdab2cfab351f23814786ba39716e90eed69047@chromium.org>
Commit-Queue: Marc-Antoine Ruel <d2bf0fc09b08f7b0888b3ddab32b3e89c7122c8b@chromium.org>

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