[autotest] Fix suite_scheduler sanity check.

Task.num is a string. Python decided that sillyness such as
|1 < "hi"| has meaning and will actually evaluate.

TEST=Ran, emitted fixes for suite_scheduler.ini
BUG=chromium-os:37920

Change-Id: I71a0dced57254e41fc82f4daf1ccd9d448bb1394
Reviewed-on: https://gerrit.chromium.org/gerrit/41333
Commit-Queue: Alex Miller <milleral@chromium.org>
Reviewed-by: Alex Miller <milleral@chromium.org>
Tested-by: Alex Miller <milleral@chromium.org>
2 files changed