Chameleon: Reduce the repeat count of display_SuspendStress to 3

The default repeat_count of display_SuspendStress test is 16, each one needs
to run about 22~34 seconds, which is quite too long for running this test, more
than 10 minutes. Due to speed it up for lab running, reduce the default
repeat_count to 3. Create more control files for more repeat count, which
don't has the SUITE='chameleon' tag such that the lab does not schedule them.

BUG=chromium:358925
TEST=manually run the test on peppy and see it passed.

Change-Id: I7b0fd8bd2c34c583242b02dbb399bff1b08d47c5
Reviewed-on: https://chromium-review.googlesource.com/212234
Reviewed-by: Wai-Hong Tam <waihong@chromium.org>
Tested-by: Ting-Yuan Cheng <tingyuan@chromium.org>
Commit-Queue: Ting-Yuan Cheng <tingyuan@chromium.org>
5 files changed