[swarming] enable test_isolated_command
[swarming] enable test_isolated_command

Bug: 1010816
Change-Id: I985b81db53a85b400b449abf14f79cf53799b6c1
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-py/+/2299161
Auto-Submit: Junji Watanabe <aaef61ef98ffea505db831f310be2a0eb8492537@google.com>
Commit-Queue: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>
Reviewed-by: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>

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