Make MobileSuspendResume more 'stressful'

Instead of using autotest 'iterations', move the loop
into the scenario to speed up the process
but to also allow for scenarios where device suspends
while it is in the process of connecting to wimax.

TEST=run the test with both wimax and cellular modems
BUG=None

Change-Id: I7e7d7c56035c85c9169419af0b15d14eefc50059
Previous-Reviewed-on: https://gerrit.chromium.org/gerrit/38169
(cherry picked from commit fdd7b3cf21b507b2f373a92e6ac6f49ba480bad4)
Reviewed-on: https://gerrit.chromium.org/gerrit/39909
Reviewed-by: Stanley Wong <stanleyw@chromium.org>
Tested-by: Stanley Wong <stanleyw@chromium.org>
4 files changed