power_LoadTest: Add flimflam test module path

Something changed with the flimflam test module path, so import it before
importing flimflam.

BUG=chromium:322383
TEST=run power_LoadTest

Previous-Reviewed-on: https://chromium-review.googlesource.com/178549
(cherry picked from commit 59405505bdf7284425645edc162436fd89fb6d51)
Previous-Reviewed-on: https://chromium-review.googlesource.com/178092
(cherry picked from commit 08d2ef629684a3269bb4d7ea16d05e175c47cbe4)

Change-Id: Ie3ec7c16b7f2e22786e6ddf31b3dd773bcd04ac5
Reviewed-on: https://chromium-review.googlesource.com/179231
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Tested-by: Derek Basehore <dbasehore@chromium.org>
1 file changed