Add loop variable in power_MemorySuspend

Add loop variable to make it possible to run this test
for multiple iterations.

BUG=chromium:398674
TEST=Run this test with loop=2 using test_that

Change-Id: Iad2e263d627506f464a365be12d0b588f64b72f9
Reviewed-on: https://chromium-review.googlesource.com/210424
Reviewed-by: Daniel Erat <derat@chromium.org>
Reviewed-by: Puthikorn Voravootivat <puthik@chromium.org>
Commit-Queue: Puthikorn Voravootivat <puthik@chromium.org>
Tested-by: Puthikorn Voravootivat <puthik@chromium.org>
1 file changed